Data Sufficiency (DS) | Re: What is the standard deviation of the terms in set N? (1) Every prime

Finally a new/ unsolved question Here's how I would go about it:

S1: All primes between 20 and 50 appear once, but we dont know about how many non-primes are appearing, which numbers or how many times they appear. So S1 not sufficient.

S2: So now we know that all numbers are between 20 and 50 but dont know about which numbers and repetitions.

Together S1 and S2 still don't help with a fixed set N. Hence we cant find the Standard Deviation. So answer isE.

Cheers
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Statistics : Posted by Tukkebaaz • on 20 Sep 2023, 01:30 • Replies 1 • Views 91

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