The answer is 15.75
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14, 15, 16 and 17.
a prime number that's ONLY multiples are itself and 1. example:4*4=16 3*5=15 9*2=18 1*17=17
c) 17
17 plus 9 plus 6 plus 16 is a single number whose value is 38. The average of one number is itself.
To find the average of the numbers 12, 16, and 23, add them together: 12 + 16 + 23 = 51. Then, divide the sum by the number of values, which is 3: 51 ÷ 3 = 17. Therefore, the average of 12, 16, and 23 is 17.