A bag contains 5 red marbles, 3 yellow marbles, and 2 blue marbles. Once a marble is drawn, it is not replaced. what is the probability of drawing a blue on the first draw and a second blue marble on the next draw?

Question

Mathematics

Johan Blevins

12 March, 11:59

A bag contains 5 red marbles, 3 yellow marbles, and 2 blue marbles. Once a marble is drawn, it is not replaced. what is the probability of drawing a blue on the first draw and a second blue marble on the next draw?

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Answers (1)

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Deborah Waller · Answer 1

5 red, 3 yellow, and 2 blue ... for a total of 10 marbles

P (first one being blue) = 2/10 which reduces to 1/5

not replaced

P (second one is blue) = 1/9 ... because u already pick a blue, meaning there is only 1 left, and there is one less marble, so there is a total of 9 marbles.

P (both events happening) = 1/5 * 1/9 = 1/45 <==