The mean of two number is 13. If one of them is 20, find out the other
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Given
The mean of two numbers is 13
one number is 20
To Find
the other number
Formula for finding mean:
Let the second number be 'x'
According to the question
There are two terms or numbers say 23 and x
and no.of terms is 2
Cross multiply to both sides :
∴The other number is 17
Check:-
Mean =23+17/2
Mean=40/2
Mean=20
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