Find the average of the first four prime number... - JAMB Mathematics 2018 Question
Find the average of the first four prime numbers greater than 10
A
20
B
19
C
17
D
15
correct option: 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
= \(frac{(11 + 13 + 17 + 19)}{4}\)
= \(\frac{60}{4}\)
= 15
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