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Silvia's test scores are 86,81 and 92 what must she score on her fourth test in order to have an average of 90 for all four tests
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Silvia's test scores are 86,81 and 92 what must she score on her fourth test in order to have an average of 90 for all four tests
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Apr 6, 2017
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silvia's test scores are 86,81 and 92 what must she score on her fourth test in order to have an average of 90 for all four tests
Mathematics
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Wingear
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90 * 4 = 360 (total of 4 tests for average of 90)
86 + 81 + 82 = 259 (total first 3 tests)
360 - 259 = 101
answer:
In order to have an average of 90, she must score 101 on her 4th test.
Vidhya Sri
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Apr 7, 2017
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Silvia has to score a 101 to get an average of 90 for all four tests.
Explanation: 90=(86+81+92+x)/4
360=259+x
101=x
Mahmoud Moawad
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Apr 10, 2017
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