The average of 13 numbers is 7. If each number is multiplied by 3, then what will the new average be?
The average of 13 numbers is 7. If each number is multiplied by 3, then what will the new average be?
13 संख्याओं का औसत 7 है। यदि प्रत्येक संख्या को 3 से गुणा कर दिया जाए, तो नया औसत क्या होगा?
Detailed Solution & Logic
Correct Answer:
21
Average of 13 numbers = 7
Sum of the numbers:
$\text{Sum} = 13 \times 7 = 91$
If each number is multiplied by 3, the total sum will also be multiplied by 3.
New sum:
$91 \times 3 = 273$
New average:
$\frac{273}{13} = 21$
New average = 21
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