Question

find the average of 15, 17, 19, 21​

Answer 1

Answer:

18

Step-by-step explanation:

$average = \frac{sum \: of \: the \: numbers}{ \: numbers\: of \: numbers}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{15 + 17 + 19 + 21}{4}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{72}{4}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 18$

Answer 2

$\huge\underline\mathfrak\blue{Answer}$

Average = (15 + 17 + 19 + 21) / 4

= 72/4

= 18

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