Question

In a class of 40 students 25 are girls the probability of selecting a boy is

Answer 1

Answer : 15 / 40 or 3 / 8

Given,

Number of students = 40 .

Number of girls = 25

Number of boys = 40 - 25 = 15 .

So,

Probability of selecting a boy is required to be found.

Sample space is the class.

n ( S ) = 40

Number of favourable outcomes are 15 .

So,

Probability of selecting a boy = 15 / 40 = 3 / 8

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Answer 2

Hola!

Here is your answer

Total strength = 40 students, out of which 25 are girls.

Therefore,

Number of boys = 40 - 25

= 15

Probability = No. of favorable outcomes/ total number of outcomes.

Total outcomes - 40

therefore,

Probability = 13/40

= 3/8


Hope it helps!