A bowl contains only red marbles, blue marbles and green marbles. The probability of selecting a red marble from the bowl is 3/13. The probability of selecting a blue marble from the bowl is 2/5. There are fewer than 100 marbles in the bowl. What is the probability of selecting a green marble and then a red marble from the bowl on the first two selections, assuming marbles are not returned to the bowl after being pulled?

There must be 65 marbles in the bowl because 5 and 13 have the lowest common multple of 65....

3/13 = 15/65 and 2/5 = 26/65

15 are red, 26 are blue and 65 - 15 - 26 = 24 are green

So...the probability of selecting green and then red =

(24/65) (15/64) = (24/64) (15/65) = ( 3/8) (3/13) = 9 / 104

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- secretivepoems

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3 years ago

The height of one right cylinder is 5 centimeters and its radius is 2 centimeters. The height of the second right cylinder is 20