Question

Lucy has nine black marbles, ten clear marbles, and two blue marbles in a bag.

If she picks one at random, what is the probability that she will pick a black
marble?
ME
9/10
3/7
3/4
10/21​

Answer 1

3/7

Explanation:

To find the probability of choosing a black marble you would have the number of marbles in total as the denominator and the number of black marbles as the numerator and simplify.

Hope it helps