CPM Homework Help : CC2 Problem 4-54

The probability of getting a white marble from a bag is $\frac { 1 } { 5 }$ . If there are $37$ white marbles in the bag, what is the total number of marbles in the bag?

Step 1:

Set up equivalent fractions.

$\frac{1}{5}=\frac{37}{?}$

Step 2:

Solve for the missing denominator.

Answer:

$185$ marbles