Question 101

The sum of five numbers is 555. The average of first two numbers is 75 and the third number is 115. What is the average of last two numbers ?

Solution
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Let the five numbers be A,B,C,D and E.
So, A+B+C+D+E = 555
A+B = 75*2 = 150
C = 115
Hence, D+E = 555-150-115 = 290 and their average equals 145

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