Question

Ex 15.1 Class 9 Maths Question 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.
Solution:
Here, the total number of trials = 30
Number of times, the ball touched the boundary =6
• Number of times, the ball missed the boundary = 30 - 6 = 24
Let the event of not hitting the boundary be represented by E, then
P(E)=[No.oftimesthebatswomandidnothittheboundary][Totalnumberofballssheplayed] =2430=45
Thus, the required probability = 45

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Answer 1

According to the question,

Total number of balls = 30

Numbers of boundary = 6

Number of time batswoman didn’t hit boundary = 30 – 6 = 24

Probability she did not hit a boundary = 24/30 = 4/5