Question

10. How many distinct sets of three positive integers have a mean of 6, a
median of 7, and no mode?​

Answer 1

Answer:

Mean=6

∴ Sum=6×3=18

Median=7

It must be the numbers less than 7 and greater than 7 and 7 must be included.

Examples:{1,7,10}

{2,7,9} and {3,7,8}

So there are three sets.