### Home > CC1MN > Chapter 11 > Lesson 11.2.1 > Problem11-39

11-39.

Thu has a bag with $7$ green marbles, $5$ blue marbles, and $4$ red marbles. For each part below, if the marble selected is replaced before the next marble is drawn, what is the probability that she will draw.

1. A red marble?

Remember that probability can be written as a fraction:

$\frac{\text{# of red marbles}} {\text{Total # of marbles}}$

How many red marbles are there?
How many total marbles?

1. A red or a green marble?

See part (a).

$\frac{11}{16}$

1. An orange marble?

See part (a).