Multiple choice

The average weight of nine mangoes increases by 20 g if one of them weighing 120g is replaced by another. The weight of the new mango is

  1. 200 gm.

  2. 260 gm.

  3. 300 gm.

  4. 180 gm.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If total weight is W, original average is W/9. After replacement, new average is (W-120+x)/9 = W/9 + 20. Solving: W - 120 + x = W + 180, so x = 300g. The 20g increase applies to all 9 mangoes, so the new mango must be 120 + 9×20 = 300g.

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