QuestionFind the average mass of pennies with $12\%$ from San Francisco ($2.2 \mathrm{~g}$) and $88\%$ from Philly ($2.156 \mathrm{~g}$).

Studdy Solution
Calculate the average mass.
$$Average\, mass = (0.12 \\times2.2\, g) + (0.88 \\times2.156\, g) =2.1652\, g$$The average mass of pennies in this sample is2.1652 g.