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After 4 tests andrew's average score was 88 what score must he earn on next test to have 5 test average of 90?
Wiki User
∙ 9y ago
Verified answer
The next test must be a grade of 98. You find this by multiply 4 by 88 and subtracting this from 5 multiplied by 90. This is 450 - 352, or 98.
Wiki User
∙ 9y ago
Anonymous
96
What score must she earn on the fourth test if a student wants an average or arithmetic mean of exactly 87 and she earned scores of 87 then 81 and 88 on the first 3 of 4 tests?
42
What if your test grades are 83 94 86 and 91 what grade fo you need to earn on your next test to have an average of 90?
An average is worked out by dividing the total of the scores by the number of scores. You have 4 scores already so when you have done the next test it will be 5 scores. If you multiply 5 scores by 90 it gives you a total score of 450. The 4 scores you already have adds up to a total of 354. If you subtract 354 from the 450 you get 96 and that is your target for the final test. The average for the first 4 tests comes out at 88.5
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What score must she earn on the fourth test if a student wants an average or arithmetic mean of exactly 87 and she earned scores of 87 then 81 and 88 on the first 3 of 4 tests?
42
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