Additive Rules Practice

Answer 1

1. A bag contains 5 red marbles and 3 blue marbles. What is the probability of drawing a red marble or a blue marble from the bag?

To find the probability of drawing a red marble or a blue marble, we add the individual probabilities of drawing a red marble and drawing a blue marble.

Probability of drawing a red marble = 5/8
Probability of drawing a blue marble = 3/8

Probability of drawing a red marble or a blue marble = Probability of drawing a red marble + Probability of drawing a blue marble
= 5/8 + 3/8
= 8/8
= 1

Therefore, the probability of drawing a red marble or a blue marble from the bag is 1.

2. A box contains 4 green balls and 6 yellow balls. What is the probability of drawing a green ball or a yellow ball from the box?

Probability of drawing a green ball = 4/10
Probability of drawing a yellow ball = 6/10

Probability of drawing a green ball or a yellow ball = Probability of drawing a green ball + Probability of drawing a yellow ball
= 4/10 + 6/10
= 10/10
= 1

Therefore, the probability of drawing a green ball or a yellow ball from the box is 1.