Question

In Leza's class 44% of students are girls.

a) If one student is absent from the class, what is the probability that the absent student is a girl? Express in fraction in lowest terms.

b) How many boys are in the class? Explain your strategy.

Answer 1

In Leza's class 44% of students are girls.

Thus, P(selecting a girl from class) = 44/100

a) If one student is absent from the class, what is the probability that the absent student is a girl?

=> probability of selecting 1 girl

= 44/100

= 11/25

b) How many boys are in the class? Explain your strategy

=> Now.

P(selecting a boy from class) = 1 - P(selecting a girl from class)

= 1 - (44/100)

= 56/100= 14/25

If class strength is 25 then there are total 14 boys in the class

Now the class strength has to be multiple of 25 lets say x

Thus, number of boys in the class = (14/25)*x

where x = strength of the class