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Question

A box contains 1 red and 3 identical white balls. Two balls are drawn at random in succession without replacement. Write the sample space for this experiment

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Solution

A box contain 1 red and 3 identical white balls

Let R denote the red ball and W denote the identical white ball

The 2 ball selected at random in succession without replacement

Sample space is

S={RW,WR,WW}

1st ball 2nd ball
R W
W R
W W

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