Question

A jar has 20 marbles: 3 green, 12 blue, 5 red. what is the probability of randomly choosing a red and then a green marble (keep the red marble when you choose it)?

a) 25 .16 = .41 = 41% .
b) 25 - .16 = .09 = 9%
c) 25 x 16 = 400% .
d) 25 x .16 = .04 = 4%

Answer 1

To find the probability of randomly choosing a red and then a green marble from a jar, multiply the probabilities of each event happening.

Step-by-step explanation:

To find the probability of randomly choosing a red and then a green marble from the jar, we need to consider the total number of marbles and the number of red and green marbles. There are 20 marbles in total: 3 green, 12 blue, and 5 red. When we select a red marble from the jar, we keep it. So the probability of choosing a red marble is 5/20. After selecting a red marble, there are now 19 marbles left in the jar: 3 green, 12 blue, and 4 red. The probability of selecting a green marble from the remaining marbles is 3/19. To find the overall probability of both events happening, we multiply the probabilities together: (5/20) x (3/19) = 15/380 = 3/76. Therefore, the correct answer is not listed among the given options.