Tommy has a history test on Monday morning. He writes down the number of minutes he studies for the test each day for a week. Using his chart, calculate the average number of minutes he studied each day. If necessary, round your answer to the nearest tenth.    Day       Mins                          Monday-30                          Tuesday-20                          Wednesday-0                          Thursday-0                          Friday-0                          Saturday-0                          Sunday-120

To find the average, add up all the numbers, then divide that answer by the quantity of numbers.

STEP 1:
add all numbers

=30 + 20 + 0 + 0 + 0 + 0 + 120
=170 total


STEP 2:
divide total from step 1 by 7 (total quantity of numbers given, including zeros)

=170 ÷ 7
=24.2857
=24.3 rounded to nearest tenth


***You could also calculate the average by adding only non-zero results (20,30,120) and then dividing by 3 (the quantity of only non-zero numbers).


ANSWER: The average number of minutes studied per day is 24.3.

Hope this helps! :)