Answer-The average of 16 numbers is 20. The average of 1st 7 numbers is 15 and the average of the last 7 nu...

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Let the 8th and 9th numbers be x and y respectively. Sum of 16 number  16  20  320 Sum of first 7 number  7  15  105 Sum of last 7 number  7  25  175 ATQ x  y  320 - 105 - 175 x  y  40 We know that x  16  y so, 16  y  y  40 2y  40 - 16  24 y  12 then, x  16  12  28

The average of 16 numbers is 20. The average of 1st 7 numbers is 15 and the average of the last 7 numbers is 25. The 8th number is 16 more than the 9th number. What is the value of the 8th and 9th numbers?

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