Q7 of 55 Page 623

In a cricket match, a batsman hits a boundary 6 times out of 30 balls he plays. What is the probability that in a given throw, the ball does not hit the boundary?

Total number balls batsman played = 30

Number of batsman hits a boundary = 6

Number of batsman doesn’t hit a boundary = 30 – 6 = 24

Probability P() =

Probability of batsman not hitting a boundary is

P(no boundary) = = =

The table given below shows the month of birth of 36 students of a class:

Month of birth	Jan.	Feb.	March	April	May	June	July	Aug.	Sep.	Oct.	Nov.	Dec.
No. of students	4	3	5	0	1	6	1	3	4	3	4	2

A students is chosen at random from the class. What is the probability that the chosen student was born in October?

In 50 tosses of a coin, tail appears 32 times. If a coin is tossed at random, what is the probability of getting a head?

A die is thrown 40 times and each time the number on the uppermost face is noted. It was recorded as under:

Outcome	1	2	3	4	5	6
Number of times	5	6	8	10	7	6

A die is thrown at random, What is the probability of getting a 5?

In 50 throws of a die, the outcomes were noted as under:

Outcome	1	2	3	4	5	6
Number of times	8	9	6	7	12	8

A die is the at random. What is the probability of getting an even number?