CAT Quantitative Ability Questions | CAT Averages, Ratio & Proportion questions
CAT/2000
Question . 80
There are seven consecutive natural numbers such that the average of the first five is n. Then average of all seven numbers will be?
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Explanatory Answer
Method of solving this CAT Quantitative Ability Question from Averages, Ratio & Proportion question
(b) If n is the average of 5 natural numbers. Therefore n should be the middle term.
Then the first five numbers will n – 2, n – 1, n, n + 1, n + 2
Now, n - 2, n -1; n, n +1, n + 2, n + 3, n + 4 will be all seven no.
Hence, new average will be (n + 1).