Multiple Choice Questions

The average weight of 9 mangoes increase by 20 grams if one of them weighting 120 grams is repl...........

Quantitative Aptitude (CDS) Average

The average weight of 9 mangoes increase by 20 grams if one of them weighting 120 grams is replaced by another. The weight of the new mango is ?

180 gm

200 gm

260 gm

300 gm

Let say average wt of 9 Mangoes = x gm

weight of 9 Mangoes = 9 x gm

Let say weight of mango which was replaced by 120gm mango = M gm

New weight of 9 Mangoes = 9x + M - 120 gm

New Average = x + 20 gm

9 (x + 20) = 9x + M - 120

= 9x + 180 = 9x + M - 120

= M = 300 gm

Hence, option 4 is the correct answer.

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