Answer:
The average is 63.6
Step-by-step explanation:
Step 1: Calculate the total points of all tests together
The total of the 4 tests is : 83.2 points + 44.6 points + 74.4 points + 52.3 points = 254.5 points
Step 2: Calculate the average points
We have 4 tests so we divide the total number by 4
254.5 points / 4 = 63,625 points
Step 3: take significant digits into account
Sum or difference : Add or subtract in the normal way, then round the answer to the LEAST number of places to the decimal point of any number in the problem
⇒ in this case : 83.2 + 44.6 + 74.4 + 52.3 = 254.5
Multiplication and division: the answer is reported in such a way that it reflects the reliability of the least precise operation. Your answer cannot be MORE precise than the least precise measurement.
254.5 / 4 = 63.6