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Quantitative Aptitude

Pascal's Triangle

What is the t...

Question

What is the total number of ways of selecting at least one ring from 2 sets of 10 identical rings picking at least one from each set?

A

110

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B

100

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C

121

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D

120

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Solution

The correct option is B 100
If we have to pick at least 1 ring from each set, then it will be 10 ways for each set. Hence, the total number of ways =10 x 10 = 100

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