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The average of 8 numbers is 20, the average of the first two numbers is 15  and that of the next three is 21  If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eighth number is

(a) 18                (b) 22          (c)  25           (d) 27



Question ID - 50789 | SaraNextGen Top Answer

The average of 8 numbers is 20, the average of the first two numbers is 15  and that of the next three is 21  If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eighth number is

(a) 18                (b) 22          (c)  25           (d) 27

1 Answer
127 votes
Answer Key / Explanation : (c) -

Let the eighth numbers be then, sixth number =

Seventh number =

So,

127 votes


127