Question

S
Remark : In all the examples above, you would have noted that the probability of an
event can be any fraction from 0 to 1.
EXERCISE 15.1
1. In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find
the probability that she did not hit a boundary.
2. 1500 families with 2 children were selected randomly, and the following data were
recorded:
2
Number of girls in a family
0
475
814
211
Number of families
Compute the probability of a family, chosen at random, having
(1) 2 girls
(it) i girl
(II) Nogirl
Also check whether the sum of these probabilities is 1.
3. Refer to Example 5. Section 14.4. Chapter 14. Find the probability that a student of the
class was born in August.
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Answer 1

Answer:

1.probability of hitting a boundary=(6÷30) =

0.2

so the probability of not hitting a boundary=total probability-probability of hitting a boundary

=1-0.2=0.8