Question

what is the average of first 10 composite numbers​

Answer 1

First 10 composite numbers are :

4, 6, 8, 9, 10, 12, 14, 15, 16, 18

Their sum is 112

Average = $\dfrac{Sum\:of\:observations}{Number\:of\:observations}$

☛ Average = $\dfrac{112}{10}$ = 11.2

∴ $\pink{\underline{\pink{\underline{\tt{\red{Average\:=\:11.2}}}}}}$


Additional information :-

Average is the number expressing central value of a given set of numbers. Average is also known as Mean or Arithmetic Mean.

Answer 2

$\underline{\mathfrak{\huge{The\:Question:}}}$

What is the average of first 10 composite numbers ?

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We'll start with noting down the first 10 composite numbers. There's no defined formula for it, so you need to pick them up by checking if they are primes. If they aren't primes, then they'll definitely be composite

The first 10 composite numbers are = 4, 6, 8, 9, 10, 12, 14, 15, 16, 18

Their sum will be = 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18

=》 Their sum will be = 112

The average or the A.M. ( Arithmetic Mean ) of these set of numbers will be :

$\tt{\frac{Sum\:of\:observations}{Number\:of\:observations}}$

=》 $\tt{\frac{112}{10}}$

=》 $\tt{11.2}$

Thus, the average will be 11.2