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11-07-2020
Mathematics

contestada

Find the missing number if the average is 7.
6 and
A) 8
B) 10
C) 12
D) none of the above

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11-07-2020

Answer:

A) 8

Step-by-step explanation:

The average of two numbers is 7.

6 and x have an average of 7.

sum of terms / number of terms = average

(6 + x)/2 = 7

6+x = 14

x = 8

The number is 8.

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