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Question
Salma's average in four tests is 80% . what mark does she need to score in her fifth test to make her average 84% ?
100%
94%
84%
96%
ANSWER : 1
Descrption
<p>the sum of the first 4 test scores is 4*80 = 320</p> <p>the sum of ALL 5 scores to be 5*84 = 420</p> <p>she need score in her fifth test = 420 - 320 = 100</p>
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