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The average of 10 numbers is 7. What will be the new average if each of the numbers is multiplied by 8?
(A) 15
(B) 45
(C) 52
(D) 55
(E) 56
(A) 15
(B) 45
(C) 52
(D) 55
(E) 56
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12 Aug 2021, 06:10
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Understand the question and make inferences:
The average of 10 numbers is 7.
Means total = 10*7 =70
What will be the new average if each of the numbers is multiplied by 8?
If each number is multiplied by 8 then the total will be multiplied by 8
= 70 * 8
As we need to take the average out
the sum of numbers/no. of numbers
= 70*8/10
= 56
Answer : E
The average of 10 numbers is 7.
Means total = 10*7 =70
What will be the new average if each of the numbers is multiplied by 8?
If each number is multiplied by 8 then the total will be multiplied by 8
= 70 * 8
As we need to take the average out
the sum of numbers/no. of numbers
= 70*8/10
= 56
Answer : E
