Prove that a cyclic parallelogram is a rectangle.

Every letter of the English alphabet is coded into numbers like A stands for 1, B for 2 and so on.. Decode the letters used in the phrase RESPECT GIVEN IS RESPECT EARNED. Find the probability of each letter used (only once) to form the phrase from the total sum of all the 27 decoded letters

find the mean of first 10 prime numbers

 Two coins are tossed simultaneously . Find the probability of getting 

(a) two heads

(b) at least one head

(c) no head 

(d) at most one head

The king, queen and jack of clubs are removed from a deck of 52 playing cards and then well shuffled. One card is selected from the remaining cards. Find the probability of getting

1. A heart

2. A king

3. A club

4The '10' of hearts

A bag contains 5 pens and 6 pencils. If a boy selects 2 articles from the bag then what is the probability that the selected articles will be a pen and a pencil

Q. Three coins are tossed simultaneously 200 times with the the following frequencies of different outcomes:

  Outcome  Frequency

  3 heads  23

  2 heads  72

  1 head  77

  no head  28

  How to find probability of getting:

  1. three heads  2. at least two heads  3. two heads and one tail

how to write a maths project for icse class ix on planning a delivery route for a postman

in a cricket match a batsman hit a boundary 6 times out of 30 balls she plays. find the probablity that she did not hit boundary?

give me chapter wise weightage of all the chapter in maths of sa2 exam..

a class consist of 50 students out of which 30 are girls . the mean of marks scored by girls in a test is 73 & that of the boys is 71 . find the mean score of whole class .

A number x is chosen at random from the numbers -3.-2,-1,0,1,2,3. Find The probability that [x]<2

 A piggy bank contains hundred 50 p coins,fifty 1 rupee coins,twenty 2 rupee coins &ten 5 rupee coins.If it is equally likely  that one of the coins will fall out when the bank is turned upside down,what is the probability that the coin: 1)will be a 50p coin? 2)will not be a 5 rupee coin? 3)which mathematical concept is used in above problem? 4)what is its value?  ( pls  .... i need the answer today)

 A bag contains 12 balls out of which x are white.If one ball is taken out from the bag, find the probability of getting a white ball.If 6 more white balls are added to the bag and the probability now for getting a white ball is double the previous one, find the value of x.

The probability of guessing the correct answer to a certain question is X/2 (X by 2). If probabiliy of not guessing the correct answer is 2/3 (2 by 3), then find X.

Please answer the question urgently. My exam is on 20th Thursday.

Thanks

Could u give me an insight of how the well-shuffled pack 52 cards works?

 What is the probability of getting 53 Sundays  in a leap year and in a non leap year?

Q7. Two dice are thrown simultaneously 500 times. Each time the sum of two numbers appearing on their tops is noted and recorded as given ahead table: Sum 2 3 4 5 6 7 8 9 10 11 12 Frequency 14 30 42 55 72 75 70 53 46 28 15 If the dice are thrown once more, What is the probability of getting a sum i) 3? ii) More than 10? iii) Less than or equal to 5? iv) Between 8 and 12?

A mixed doubles tennis game is to be played between 2 teams(each team consists of 1 male & 1 female).There are 4 married couples.No team is to consist of a husband & a wife.What is the maximum number of games that can be played? : options are :

a 12 , b 21 , c 36, d 42 [IAS 2006]

my approach gives answer as 66 in this way: Let A,B ,C and D are 4 males . A can make team with other 3 females in 3 ways.Similarly B can make team with other 3(except his wife say X) females in 3 ways.Similarly C & D will make 3 teams each , making it a total of 4*3 =12 teams.Now , Question becomes like 12 teams can be arranged in how many ways ?

It is = 12C2 (because 1 GAME needs 2 TEAMS)

=12!/ 2! *10! = 66 GAMES . But, this is not in the options. Plz help me finding out the error I committed and provide me the right solution soon.

Two dice is thrown simultaneously . The probability of getting a multiple of 2 on one die and a multiple of 3 on the other is .

(a) 5/36 (b)5/12 (c)11/36 (d) 1/12

Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:

3 heads 23

2 heads 72

1 head 77

no heads 28

find the probability of getting

( i) 3 heads

(ii) at least 2 heads

(iii) two heads and one tail

3 of the 6 vertices of a regular hexagon are chosen at random find the probability that the triangle with three vertices is equilateral.

A and B are the only two outcomes of an event.Probability of P(A)=0.72,then what will be the probability P(B) and why?

1500 families with 2 children were selected randomly and the following data were recorded:

number of girls in a family: 0 1 2

frequency: 211 814 475

if a family is chosen at random,compute the probability that it has:

1. no girl.

2. 1 girl.

3. 2 girls.

4. at most one girl.

5. more girls than boys.

chech whether 7/6 can be an empirical probability or not. give reasons.

Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg):

4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00

Find the probability that any of these bags chosen at random contains more than 5 kg of flour.

In a class of 50 students 70% were passed. What is the probability of a failing child?

Lead spheres of diameter 6 cm each are dropped into a cylinderical beaker containing some water and are fully submerged. If the diameter of the beaker is 18 cm and water level rises up to 40 cm, find the number of lead spheres dropped into water.

A bag contains 4 white balls and some red balls. If the probability of drawing a white ball from the bag is 2/5, find the number of red balls in the bag.

following deetails show thebirth month of 40 students of class 9:

jan.-3, feb.-4,

march-2,april-2,

may-5,june-2,

july-2,aug.-5,

sep.-3,oct-4,

nov.-4,dec.-4..

find the probability that a student was born in august.

17 cards numbered 1,2,3........17 are put in a box and mixed thoroughly. One person draws as ard from the box. Find the probability that a number on the card is (i) odd (ii) a prime

 what is probablit that a card selected from a pack of 52 cards is-niether a black nor a king.

(m/n)x^2 + n/m = 1 - 2x

The probabilities of a student getting grade A,B,C AND D are0.2,0.3,0.15,0.35 respectively. then the probability that a student gets at least C grade is

a)0.65 b)0.15 c)0.50 d)0.35

A box contains 50 bolts and 150 nuts. On checking the box ,it was found that half of the bolts and half of the nuts are rusted. If one item is chosen at random, find the probability that it is rusted.

1. 2 Heads coming up
2. 1 Head coming up

which of the following cannot br empirical probability of an event?

a] 4/5

b] 1

c] 0

d] 5/4

A die is thrown 100 times.If the probability of getting an even number is 2/5.how many times an odd number is obtained?

two dice are thrown simuntaneously 500 times . each time the sum of two numbers appearing on them is not written

sum frequency

2 14

3 30

4 42

5 55

6 72

7 75

8 70

9 53

10 46

11 28

12 15

find the PROBABILITY of getting a sum

1)more than 10

2)between 8 and 12

Q-If the probability of winning a game is 0.4 what is theprobabilityof losing it ?

If x is the mean of n observations x₁,x₂,x₃......x_n.Then sigma ⁿ_i=1 (x₁-x) is ??

A RECENT SURVEY FOUND THAT THE AGES OF WORKERS IN FACTORY ARE DISTRJBUTED AS

AGE IN YRS 20-29,30-39.40-49,50-59,60 AND ABOVE

NO.OF WORKERS 38,27,86,46,3

IF A PERSON IS SELECTED AT RANDOM FIND THE PROBABILITY THAT THE PERSON IS

1. 40 YRS OR MORE

2.UNDER 40YRS

3.UNDER 60 BUT NOT OVER 39YRS

 what does the statement inside the bracket following P mean?

eg- P(two heads will come up) 

so here does it mean "probability of two heads coming up"?

Differentiate between exhaustive events and sample space.

How to make a sample space for an experiment.

five cards--the ten,jack,queen,king and ace of diamonds, are well-shuffled with their face down.One card i picked up with random.1)what is the probablity that the card is the queen? 2)if the queen is drawn and put aside, what is the probablity that the secondncard is up is (a) an ace? (b) a queen ?

the probability of guessing a correct answer is x/2. if the probability of nat guessing it correct is 2/3, then x is..........

in a hurdle race, a player has to cross 10 hurdles. the probability that he will clear each hurdle is 5/6. what is the probability that he will knock down fewer than 2 hurdle????

1.WHEN 3 COINS ARE TOSSED ONCE, FIND THE PROBABILITY OF GETTING AT LEAST ONE HEAD.

2. WHEN 3 COINS ARE TOSSED SIMULTANEOUSLY,FIND THE PROBABILITY OF GETTING AT LEAST 2 TAILS.

THANK YOU..

a coin is tossed 1000 times with the following frequencies:

Head:455, Tail: 545

Compute The Probability for each event

The percentage of marks obtained by a student in examination are given below:

Find the probability that the student gets –

i) a first class in a subject i.e. at least 60% marks.

ii) A distinction in a subject i.e. at least 75% or above.

iii) Marks between 70% and 80% in a subject.

1) A bag contains X white, Y red and Z blue . A ball is drawn at random , then find the probability of drawing a blue ball ?

 From numbers 3, 5, 5, 7, 7, 7, 9, 9, 9, 9 one number is selected at random. The probability

A die is thrown 1000 times with frequency of outcome 1,2,3,4,5, and 6 as given below

outcome 1 2 3 4 5 6

Frequency 179 150 157 149 175 190

A die is thrown once again. Find the probability of outcome "greater than 3" ?