Set X consists of different positive numbers arranged in ascending order: K, L, M, 5, 7. If K, L and M are consecutive

Set X consists of different positive numbers arranged in ascending order: K, L, M, 5, 7. If K, L and M are consecutive integers, what is the arithmetic mean of set X?

(1) The product K × L × M is a multiple of 6
(2) There are at least 2 prime numbers among K, L and M

OA E

Source: GMAT Prep

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