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Murrr4er [49]
3 years ago
10

The average of the first 3 weights was 14 pounds. The average of the next 7 was 4 pounds. What was the overall average of the we

ights?
Mathematics
1 answer:
miskamm [114]3 years ago
7 0

Answer:

Average = 10

Step-by-step explanation:

Given

First\ Three = 14 --- Average

Next\ Seven= 4 --- Average

Required

Determine the overall average

Represent the sum of the first three with x.

So:

\frac{x}{3} = 14

Solve for x

x = 14 * 3

x = 42

Represent the sum of the next seven with y.

So:

\frac{y}{7} = 4

Solve for y

y = 4 * 7

y = 28

The overall average is calculated as thus:

Average = \frac{x + y}{7}

Average = \frac{42 + 28}{7}

Average = \frac{70}{7}

Average = 10

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