RRB Group D Model Paper 4 with solutions

Question : 37 of 100

Marks: +1, -0

The average of the prime numbers between 1 and 20 is:

Solution:

(1) The prime numbers between 1 and 20 are 2, 3, 5, 7, 11, 13, 17 and 19.
Average =

{\Sum \of \all \numbers} /{\Counting \of \numbers}

⇒ Average
=

{2+ 3+ 5+ 7+ 11+ 13+ 17+ 19} /8

= 9.625

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