Question

average of 20, 30, 40 and 50 is what % of the sum of the four numbers

Answer 1

Average of 20+30+40+50=
140/4=35
Sum of these 4 numbers = 140
Let 35 be the x% of 140
So,
140 X x/100=35
14 X x/10=35
14x=350
x=350/14
x=25
Therefore, the average of 20,30,40 and 50 is 25% of their sum.

Answer 2

The average is 25% of the sum.

Given,

Numbers - 20, 30, 40 and 50

To Find,

Their average and what % of the sum of the four numbers is the average

Solution,

We have to find the sum of numbers and their average

Sum = 20 + 30 + 40 + 50

Sum = 140

Average = (Sum) / (Total numbers)

Average = 140/4

Average = 35

Now, from the given information

35 = x% of 140

35 = x/100 * 140

35 = 0.01 * x * 140

35 = (0.01)*140*x

35 = 1.4x

x = $\frac{35}{1.4}$

x = 25

Hence, the average is 25% of the sum.

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