Math Word Problem
WHAT I KNOW
-competes 10 events
-each event maximum possible score is 10 points
-to advance you need to get at least 75 points
-first five event, willy had average score of 6.8
-on next three events his average score is 7.2
-what must willy average on his final two events in order to have a total score of exactly 75 points?
SILUTION
So first what we do is we add the numbers together and divide the total by the number of numbers
Total = Average * Number of numbers
Score of first 5 events = 6.8 * 5 = 34
Score for next 3 events = 7.2 * 3 = 21.6
Total score = 75.0
Score needed for last two events = 75.0 - 34.0 - 21.6 = 19.4
Score for final 2 events = 19.4 / 2 = 9.7
Therefor willy needs average of 9.7 for a perfect score.
