Question

1. Find the average of these
a. 40, 90, 70, 80
​

Answer 1

Answer:

70 is the answer............

Answer 2

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To find:

• Average of 40, 90, 70, 80.

Solution:

$Average = \dfrac{Sum\:of\:all\: observations}{Number\:of\: observations} \\ \\ \implies Average = \dfrac{40+90+70+80}{4} \\ \\ \implies Average = \dfrac{280\!\!\!\!\!\!\bold{/}^{70}}{4\!\!\!\bold{/}_1} \\ \\ \implies \bold{ Average = 70}$

Formula Used:

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

Hope it helps!!