Question

In a class of 40 students ,if a student is selected at random,the probability of getting a girl is 0.75,find the number of boys ​

Answer 1

total number of students = 40

given probability of girl P(G)=0.75

then probability of boy is P(B)= 1-0.75

=0.25

number of boys be x

probability of getting a boy is = x/40

0.25=x/40

1/4=x/40

x= 10

therefore,the number of boys are 10.

Answer 2

$\huge{\underline{\mathfrak{aloha!!!!!}}}$

$no \: of \: boys = no \: of \: girls \div total \:number \: of \: students \\ = > \frac{0.75 }{40} \\ = > \frac{75}{4000} \\ = > 53.34$

Thnks♐️