Find the average of the first four prime numbers greater ...
Find the average of the first four prime numbers greater than 10
20
19
17
15
Correct answer is D
Prime numbers are numbers that has only two factors (i.e 1 and itself). They are numbers that are only divisible by 1 and their selves. First four Prime numbers greater than 10 are 11, 13, 17 and 19
Average = sum of numbers / number
= frac(11+13+17+19)4
= 604
= 15
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