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Hong has scored 76 ,62 ,81 , and 89 on his previous four tests. What score ....?HELPP?

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  • Hong has scored 76 ,62 ,81 , and 89 on his previous four tests. What score ....?HELPP?


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Answer #1 | 14/01 2014 09:22
72 76+62+81+89+72=380 380/5=76
Positive: 75 %
Answer #2 | 14/01 2014 09:20
The average is the sum of the scores divided by the number of scores. We have an unknown score, I'll call x. The average is 76 of the 5 scores. so we have: 76 = (76 + 52 + 81 + 89 + x) / 5 now solve for x 380 = 298 + x x = 82 He scored 82 on the last test
Positive: 66.666666666667 %
Answer #3 | 14/01 2014 09:25
76 + 62 + 81 + 89 + x = 5*76 308 + x = 380 x = required score = 72 (note: since Hong already has a single score of 76. you get the same answer from 62 + 81 + 89 + x = 4*76)
Positive: 50 %

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