Multiple choice

The average weight of 50 balls is 5 gm. If the weight of the bag be included the average weight increases by 0.05 gm. What is the weight of the bag in gms?

  1. $5.05$
  2. $6.05$
  3. $7.05$
  4. $7.55$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total weight of 50 balls = 50 × 5 = 250 gm. With bag included, average is 5.05 gm for 51 items, so total = 51 × 5.05 = 257.55 gm. Weight of bag = 257.55 - 250 = 7.55 gm.

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