Question

In a class of 18 girls and 22 boys, a prefect is to be chosen. What is the probability that the prefect would be a girl or a boy?

a) 0.45
b) 0.55
c) 0.50
d) 0.60

Answer 1

The probability that the prefect would be a girl or a boy is 1.

Step-by-step explanation:

In a class of 18 girls and 22 boys, the total number of students is 18 + 22 = 40.

The probability of choosing a boy or a girl as a prefect is the sum of the probabilities of choosing a boy and choosing a girl. The probability of choosing a boy is 22/40 while the probability of choosing a girl is 18/40. Therefore, the probability of choosing a boy or a girl is (22/40) + (18/40) = 40/40 = 1.

So, the probability that the prefect would be a girl or a boy is 1.