Question

You have a jar of 20 jellybeans with 4 red beans, and you take out 1 red jellybean. Now, after taking out this bean, what is the new probability that you will pick a red jellybean out of the jar?

a. 4/19

b. 4/20

c. 3/19

d. 3/20

Answer 1

C. 3/19
20 in total. If 1 is taken out, you will have 19. There is a total of 3 red beans left. So the chance of getting a red jellybean is 3/19

Answer 2

3/19
There are now 4-1 red beans (3) and 20-1 total beans (19) so 3 out of 19 are red meaning you have a 3/19 chance of getting a red bean