Question

A photography store develops 320 pictures on Monday, 564 on Tuesday, 281 on Wednesday, and 473

on Thursday. If the store typically averages at least 420 pictures daily, how many pictures would need to
be developed on Friday?

Answer 1

462 pictures

Explanation:

Average (mean) is calculated by adding up all the values and dividing by how many values there are, therefore to have an average 420 pictures daily, the sum of the 5 days must be: 5x420 = 2100

The current sum is: 320 + 564 + 281 + 473 = 1638

Therefore the number for Friday is 2100 - 1638 = 462 pictures.

Hope this helped!