Hard Math Class 9 Level 2

If the mean of 8 numbers is 15 and 23 is replaced by 31 then what is the new mean?

यदि 8 संख्याओं का माध्य 15 है और 23 की जगह 31 लिख दिया जाए तो नया माध्य क्या होगा?

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Correct Answer

B. 16 / 16

Explanation

Original total was 120. Replacing 23 by 31 increases total by 8 so new total is 128 and mean is 16.

कुल योग 120 था। 23 की जगह 31 से योग 8 बढ़ेगा इसलिए नया योग 128 और माध्य 16 होगा।

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