A bag contains 10

marbles:

are 3 green,

are 5 red, and

are 2 blue. Hans chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both marbles he chooses are red? Write your answer as a fraction in simplest form.

Question

Mathematics

Louis Koch

3 February, 15:22

A bag contains 10

marbles:

are 3 green,

are 5 red, and

are 2 blue. Hans chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both marbles he chooses are red? Write your answer as a fraction in simplest form.

+2

Answers (1)

Know the Answer?

Leslie Holloway · Answer 1

The answer is (5/10) * (4/9) = 20/90 = 2/9

because there are 5 red marbles out of a total of ten. if you take one out then there are 4 red marbles out of a total of 9. The probability of these events being in succession is the product of their probabilities.

any questions?

A bag contains 10marbles:are 3 green,are 5 red, andare 2 blue. Hans chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both marbles he chooses are red? Write your answer as a fraction in simplest form.

A bag contains 10

marbles:

are 3 green,

are 5 red, and

are 2 blue. Hans chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both marbles he chooses are red? Write your answer as a fraction in simplest form.