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1. Draw a scale from 0 to 1 for each of these events. Mark the scale to show the likely probability of each event.

a. Renu is tossing a coin. What is the probability of it landing on 'tail' ?

b. There are ten beads in a bag. Only one bead is red. What is the chance of picking the red bead ?

c. What is the chance of sun rising at midnight tonight ?

d. Atif is holding a brick. What is the probability that when he lets go of it, the brick will drop down ?

e. Naaz closes her eyes. What is the chance that she will pick a blue cube from this group ?

The definition of probability is as follows:

$Probability=\frac{Favourablenumberofoutcomes}{Totalnumberofoutcomes}$

(a) Since there are two possibilities when a coin is tossed. Head or Tail, So.Total no. of outcomes=2

Favourable no. of outcomes=1 (i.e tail)

So, $Requiredprobability=\frac{1}{2}$

(b)Since there are 10 beads in a bag.So,total no. of outcomes=10

Favourable no. of outcomes=1(Since there is only one red bead)

So,$Requiredprobability=\frac{1}{10}$

(c)Since sun can't rise in midnight, Required probability=0

(d) If Arif drops the brick,it will certainly fall down,Required Probability=1

(e)Since there are 6 cubes in all, Total number of outcomes=6

Favourable number of outcomes=5(since there are 5 blue cubes)

So,$RequiredProbability=\frac{5}{6}$

Best Regards

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