CPM Homework Help : CC2 Problem 5-89

A bag contains $3$ red, $5$ yellow, and $7$ purple marbles. Find the probability of drawing a purple marble followed by a red marble. The first marble is put back in the bag between draws.

Hint:

What is the probability of drawing a purple marble?
What is the probability of drawing a red marble?

More help:

Multiply the two probabilities together to find the probability of both events happening.

$\frac{7}{15}\left(\frac{3}{15}\right)$

Answer:

$\frac{21}{225}$