Question

If the probability of selecting a boy in a class is 0.6 and there are 45 students in the class, find the number of girls in the class.

Answer 1

Answer:

Step-by-step explanation:

P(boy) = 0.6 =

number of boys / number of students .

then

number of boys = 0.6 * 45 = 27.

number of girls = 45 - 27 = 18.

Answer 2

Answer:

Step-by-step explanation:

P(no. of boys) = 0.6

Total no. of students = 45

Therefore, P(girls) = 1- 0.6

= 0.4

No. of girls = 18

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