Question:The average of five result is `46`and that of the first four is `45`.The fifih result is: 

A `1` 
B `10` 
C `12.5` 
D `50` 

+ Answer
D 

+ Explanation
Fifth result 

`= (5 xx 46 - 4 xx 45)`

`= 50`.

+ Report

Irin Moni

Editor, VCampus

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