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2 years ago

A coin collector has a bag of 50 pennies. What is weighted average of a penny in the sample according to the data?

Chemistry

1 answer:

Lisa [10]2 years ago

7 0

The weighted average of a penny is = 67.9g

<h3>Calculation of average weight</h3>

The sample of penny for pre 1982 is a total of = 18 pennies.

The mass of each penny for pre 1982 = 3.1

Therefore the total weight for penny for pre 1982

= 18×3.1

= 55.8

The sample of penny for post 1982 is a total of = 32 pennies.

The mass of each penny for post 1982 = 2.5

Therefore the total weight for penny for post 1982

=32×2.5

= 80

The weighted average

= 55.8+80/2

= 135.8/2

= 67.9g

learn more about mass here:

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