Mr Cameron places the names of his students in a hat order to randomly call on students. There are 12 girls and 10 boys in the class what is the probability that a boy will be called on?

A. 1/22
B. 5/11
C. 1/10
D. 5/6

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8