Arithmetic Ability
Percentage

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Q.

The average of a set of whole numbers is 27.2. when the 20% of the elements are eliminated from the set of numbers then the average become 34. The number of elements in the new set of numbers can be :

View Answer

Correct choice: C

Explanation:

only (c) is correct since it is divisible by 4. Let the original number of element be x then the new no.of elements will be 4x5 = K So K must be divisible by 4Since, x = Kx5/4
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