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Ranjit Singh
Subject: Maths
, asked on 18/3/18
Q. There is a group of 100 people who are patriotic out of which 20 believe in non-violence. Two persons are selected at random out of them. find the probability distribution for selected persons who are non-violence. Also find the mean.
Answer
1
Ritesh Ranjan Rath
Subject: Maths
, asked on 18/3/18
Solve this:
6.
A bag contains 4 balls. Two balls are drawn at random (without replacement) and are found to be white. What is the probability that all the balls in the bag are white?
All India 2016, 2014C
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 18/3/18
No links please:
(ii) For two events A and B
w
i
t
h
P
B
≠
0
,
s
h
o
w
t
h
a
t
P
A
/
B
=
P
A
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 18/3/18
No links please:
Q. Eight dice are thrown 6561 times. How many times can one expect at least tow dice to show a 2 or 3 or 4 or 5 ?
Answer
1
Dipesh Malhotra
Subject: Maths
, asked on 16/3/18
27 fast
Q.27. In a hurdle race, a player has to cross 8 hurdles. The probability that he will clear a hurdle is
4
5
, what is the probability that he will knock down in fewer than 2 hurdles?
Answer
1
Brendan
Subject: Maths
, asked on 15/3/18
Q. Consider the experiment of tossing a coin. If the coin shows head, toss it again, but if it shows tail, then throw a die. Find the conditional probability of the event that " the die shows a number greater than 4 " given that "there is at least one tail".
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 15/3/18
No links please:
(i) Let x be a random variable which takes the value
x
1
,
x
2
,
x
3
,
x
4
,
p
(
x
=
x
4
)
=
0
.
5
,
p
x
>
x
2
=
0
.
8
a
n
d
i
f
p
x
=
x
1
,
p
(
x
=
x
3
)
are A.P. Find the probability distribution.
Answer
2
Lavneesh Rajput
Subject: Maths
, asked on 15/3/18
Q One bag A contains 5 white and 3 black ball another bag B contains 6 white and 2 black balls. A card drawn from the pack of cards. If It is club card a ball is drawn from bag A. If It is red card ball is drawn from bag B otherwise he kept quiet. The probability of getting white ball is?
Answer
2
Yashashri Thakur
Subject: Maths
, asked on 14/3/18
An urn contains 4 white and 3 red balls. Let X be the number of red balls in a random draw of
three
balls. Find the mean and variance of X.
Answer
2
Chaitanya Kapoor
Subject: Maths
, asked on 14/3/18
If.we.subtract Eb.from.Ea.intersection Eb we get Ea how they have.taken Eb
Answer
1
Jeneeta Eliza John
Subject: Maths
, asked on 14/3/18
Find the probability that a given three letter word (in English) has all letters repeated
Answer
1
Jeneeta Eliza John
Subject: Maths
, asked on 14/3/18
Please answer the following:
1. A boy throws a coin. He is to received two rupees for getting a tail and ten rupees for getting a head . find the expectation ( Mean receipt).
2. A game at a school fair cost Rs. 10, With a prize of Rs. 50. Of the probability of winning is
1
10
, is it a fair game?
Answer
2
Shubhrajyoti Ghosh
Subject: Maths
, asked on 13/3/18
No links please:
(i) If
P
(
A
)
=
2
3
,
P
(
B
)
=
1
2
a
n
d
P
(
A
∩
B
)
=
1
6
,
F
i
n
d
P
(
A
∩
B
c
)
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 13/3/18
In three bags there are 6 red, 4 black; 4 red, 6 black and 5 red, 5 black balls respectively. A bag is chosen at random and a ball is taken from it. If the ball is red then find the probability that it is chosen from the first bag.
Answer
1
Riya Verma
Subject: Maths
, asked on 27/2/18
Do we have mean and variance of binomial distribution in our syllabus this year? As it is not in the study material.
Answer
1
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What are you looking for?
Q. There is a group of 100 people who are patriotic out of which 20 believe in non-violence. Two persons are selected at random out of them. find the probability distribution for selected persons who are non-violence. Also find the mean.
6. A bag contains 4 balls. Two balls are drawn at random (without replacement) and are found to be white. What is the probability that all the balls in the bag are white? All India 2016, 2014C
(ii) For two events A and B
Q. Eight dice are thrown 6561 times. How many times can one expect at least tow dice to show a 2 or 3 or 4 or 5 ?
Q.27. In a hurdle race, a player has to cross 8 hurdles. The probability that he will clear a hurdle is , what is the probability that he will knock down in fewer than 2 hurdles?
(i) Let x be a random variable which takes the value are A.P. Find the probability distribution.
1. A boy throws a coin. He is to received two rupees for getting a tail and ten rupees for getting a head . find the expectation ( Mean receipt).
2. A game at a school fair cost Rs. 10, With a prize of Rs. 50. Of the probability of winning is , is it a fair game?
(i) If