In a class of 60 students, the ratio of girls to boys is 7: 5 how many girls are in the class how many boys are in the class?

There are 35 girls and 25 boys in the class.

Explanation

The ratio of girls to boys is 7 : 5

So, lets assume that the number of girls is and the number of boys is

Given that the total number of students in the class is 60. That means...

So, the number of girls,

and the number of boys,

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0