Question

a box contains 22 red marbles, 52 white marbles, and 10 blue marbles. if a marble is randomly selected from the box, what is the probability that it is red or blue? express your answer as a simplified fraction or a decimal rounded to four decimal places.

Answer 1

The probability of randomly selecting a red or blue marble from the box is 2/7.

Step-by-step explanation:

To find the probability of selecting a red or blue marble from the box, we need to add the number of red marbles and blue marbles together and divide by the total number of marbles in the box.

Number of red marbles = 22

Number of blue marbles = 10

Total number of marbles = 22 + 52 + 10 = 84

Probability = (number of red marbles + number of blue marbles) / total number of marbles

Probability = (22 + 10) / 84

Simplified fraction = 32/84 = 4/14 = 2/7

Therefore, the probability that the randomly selected marble is red or blue is 2/7.