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On his first three tests, Connor scored 82, 90, and 81. What score must he get on his fourth test to have an average (mean) of 80 for all four tests?​

On his first three tests, Connor scored 82, 90, and 81. What score must he get on his fourth test to have an average (mean) of 80 for all four tests?​
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On his first three tests, Connor scored 82, 90, and 81. What score must he get on his fourth test to have an average (mean) of 80 for all four tests?​

On his first three tests, Connor scored 82, 90, and 81. What score must he get on-example-1
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User Andrew Radford
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7.8k points

1 Answer

3 votes
80 x 4 = 320
82+90+81 = 253
320-253=67
He must get 67
answered
User Croote
by
7.7k points
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