Question

A jar contains several colors of jelly beans. There are red, green, black, and yellow jelly beans in the jar. You pick one jelly bean at a time, record what color you picked, and then replace the jelly bean. You do this 30 times and get the following results.

There are 5 red, 15 green, 7 black, 3 yellow.

A. 0.3
B. 0.30
C. 0.90
D. 0.10

Answer 1

The answer is B. 0.30 Just add them together

Answer 2

Answer: Option D.

Explanation:

The question is: which is the probability of selecting a yellow jelly bean?

The data that we have is that, at random selection, we got:

5 times red

15 times green

7 times black

3 times yellow.

This means that out of 5 + 15 + 7 + 3 = 30 attempts, in 3 of them we got a yellow jelly bean, then the probability can be calculated as:

P = (number of times we got a yellow bean)/(total number of attempts)

P = 3/30 = 0.10

the correct option is D