Question

In the previous steps, you determined:

pre-1982 pennies contribute 1.24 g to the
overall mass
post-1982 pennies contribute 1.50 g to
the overall mass
The overall weighted average mass comes
from combining the mass contributions
from each type of penny. Add the masses
from the previous steps together to get the
overall weighted average mass.
Weighted Average -
Pre-1982 Contribution + Post-1982
Contribution
What is the weighted average mass of a
penny from this sample?
Enter

Answer 1

2.74

Step-by-step explanation:

Okay, let's go through the previous steps:

Pre-1982 pennies contribute 1.24 g to the overall mass

Post-1982 pennies contribute 1.50 g to the overall mass

To calculate the weighted average mass, I'll add these contributions together:

Pre-1982 contribution: 1.24 g

Post-1982 contribution: 1.50 g

Total weighted average mass = 1.24 g + 1.50 g = 2.74 g