PLEASE HELP Which expression represents the probability of
rolling a 5 exactly three times in ten rolls of a
number cube with six sides?
103
1003
dla
38
100(
100'e
6

find out the value of b

step-by-step explanation:

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: