The average of some numbers is 54 6 If 75 of the numbers are increased by 5 6 each and the rest are ...........

Quantitative Aptitude (CGL) Percentage

The average of some numbers is 54.6. If 75% of the numbers are increased by 5.6 each, and the rest are decreased by 8.4 each,

then what is the average of the numbers so obtained?

This questions was previously asked in

SSC CGL 5th March 2020 Shift-2

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55.6

55.8

56.7

56.3

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Explanation:

New average of the numbers = (average + increment/decrements)
The average of some numbers = 54.6
75% of the numbers are increased by 5.6 each, and the rest are decreased by 8.4 each so,
New average of the numbers = 54.6 + (5.6 \times 75/100 - 8.4 \times 25/100) = 54.6 + 4.2 - 2.1 = 56.7

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