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Set AA consists of kk distinct numbers

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by OptimusPrep » Tue May 17, 2016 6:15 pm
nahid078 wrote:Set A consists of k distinct numbers
Statement 1: Set A consists of 12 consecutive integers.
We know the total numbers of integers in the set, but we do not know how many we have to select.
INSUFFICIENT

Statement 2: n = 5
This tells us how many numbers we have to select.
Total ways of selecting 5 numbers = 5! = 120

Out of all these selections, in only 1 the numbers will be ascending.
Hence required selection = 1

Probability = 1/120
SUFFICIENT

Correct Option: B
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