A jar contains five blue marbles and four red marbles. suppose you choose a marble at random, and do not replace it. Then you choose a second marble. Find the probability of the following event: Both selected marbles are red.

Question

Mathematics

Carlee

21 September, 20:03

A jar contains five blue marbles and four red marbles. suppose you choose a marble at random, and do not replace it. Then you choose a second marble. Find the probability of the following event: Both selected marbles are red.

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Annika Watts · Answer 1

We know there are a total of 9 marbles in the bag. If we draw one and don't replace it, there are 8 marbles left in the bag during our second choice ...

we have 4/9 for our first draw and 3/8 for our second draw ... multiplied together, we have a 1/6 chance of drawing a red marble and another red marble without replacing any after each draw.