Question

A bag contains total 30 balls out of which 9 are red, 12 are white and 9 are blue. Two balls are drawn in succession without replacement.
What is the probability that first is red and second is white?

Expert Answer

Step 1

Let us first find probability that the first ball is red. For that we will need the following.

Since, there are total 30 balls out which 9 are red, we have:

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Step 2

Probability (P1), that the first ball is red, is now given as:

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Step 3

Let us now find probability that the second ball is white. For that we will need the following.

Since, one ball is already drawn; total ...

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Probability

Basic Probability

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