Question

What is the the average of
15, 17, 19, 21​

Answer 1

Answer:

method 1

Avg = sum/number of terms

Remember, in any given series of numbers avg will be the number in the exact middle of the series.

here there are 4 numbers. so it's middle value will be the number between 17 and 19, which is 18.

so avg = 18

method 2

we can also use above formula to find the avg

sum= (15+17+19+21) = 72

total number of terms = 4

so avg = sum/n = 72/4 = 18

Answer 2

Given: The numbers are$15, 17, 19, 21$.

We have to find the average of the above numbers.

As we know that an average is a number that is calculated by adding quantities together and dividing the total by the number of quantities.

We are solving in the following way:

We have,

The numbers are$15, 17, 19, 21$

So, the average of the above numbers will be:

$=>\frac{15+17+19+21}{4} \\\\=>\frac{72}{4} \\\\=>18$

Hence, the average of the above numbers is$18$.