Problem Solving (PS) | If x, y, z are distinct prime numbers, which of the following could be

If x, y, z are distinct prime numbers, which of the following could be true?

I. x is the mean of the three primes.
II. xyz - 1 is a prime
III. 27 is divisible by xyz


A. Only I
B. Only II
C. Only III
D. I & II
E. I, II &II





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