Question

the probability of getting a white marble is 1/5. if there are 37 marbles in the bag how many total marbles is there?

Answer 1

P(White) = (number of white)/(number total)

1/5 = 37/x

solve for x

Answer 2

I need a explanation though, its what i dont understand.

Answer 3

cross multiply to get

1*x = 5*37

x = ???

Answer 4

probability is just a fraction of (number you want)/(number total)

you would set the probability fraction equal to the given fraction 1/5 and solve for x