Hope this helps a bit
The test score for a class are shown. What is the average test score? 79,80,92,92,81,100,88,98,71,100,91,90
1 answer:
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Let's call the number we're looking for . We know that
is twice as much as
.
Twice as much as a number simply means the double of that number, and in turn the double of a number means to muliply that number by 2.
So, in order to obtain , you have to multply
by 2. In formula, you have
or simply