Question

A paperclip weights 0.83g on average.

An empty envelope itself weighs 2.43g.
One such envelope contains a mystery number of paperclips inside.
With paperclips inside, it weighs 49.5g
Calculate number of paperclips

Answer 1

Explanation:

Subtract the envelope weight from the total weight....this will result in the weight of the paperclips alone:

49.5 g - 2.43 g = 47.07 g of paper clips

Then:

47.07 g / ( .83 g /clip) = 56.7 = ~ 57 clips