Use the word bulldog to answer the question. if the letters of this word are written on paper and then cut into squares with one letter per square, what is the probability of selecting a c or a z?

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: