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Five students wrote a mathematics test. The average mark was 68. If the marks
for four of the students were 75, 62, 84 and 53, the mark of the fifth student
was
A) 66    B) 68     C) 76     D) 68.5    E) 56

 Apr 11, 2020
 #1
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+1

If x is the mark for the fifth student, then:  (75 + 62 + 84 + 53 + x)/5 = 68  or  (274 + x)/5 = 68  

 

Rearrange this to find x.

 Apr 11, 2020

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