Arithmetic ReasoningPregunta 5 de 120
The average of four test scores is 85. Three of the scores are 80, 90, and 85. What is the fourth score?
a.85
b.80
c.90
d.95
Explicación
An average of 85 over four tests means the total is 85 times 4, or 340. The three known scores add to 255, so the fourth score is 340 minus 255, which equals 85.
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