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Question

The numbers 1,2,3 and 4 are written separately on four slips of paper. The slips are put in a box and mixed thoroughly. A person draws two slips from the box, one after the other, without replacement. Describe the sample space for the experiment.

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Solution

Given:
The numbers 1,2,3 and 4 are written separately on four slips of paper. The slips are put in a box and mixed thoroughly. A person draws two slips from the box, one after the other, without replacement.

Four slips marked as 1,2,3,4, are put in the box and mixed up.
A person draws two slips one after other without replacement. So, (1,1),(2,2),(3,3) and (4,4) are not possible.
Hence the required sample space is
S={(1,2),(1,3),(1,4),(2,1),(2,3),(2,4),(3,1),(3,2),(3,4),(4,1),(4,2),(4,3)}.

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