A probability problem by karandeep singh ludhar

Probability Level 1

Next door to me live four brothers of different heights. Their average height is 74 inches, and the difference in height among the first three men is two inches/'The difference between the third and the fourth man is six inches. Find the sum of their heights.
Source- A book .


The answer is 296.

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Karandeep Singh Ludhar by karandeep singh ludhar , 21, India

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3 solutions

average = sum of variables/number of variables

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Noel Lo
Jun 2, 2015

74*4=296 just the average times the number of brothers.

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Taran Kota
May 17, 2015

Since the average of four men is 74, we only need to multiply this number by 4 to get the sum of the men's heights.

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