Maths / Comparing Quantities / Using OF Operator in Percentages

QUESTION
 

Total number of students at an examination, if 21% fail and the number of failing students 189, is

OPTIONS
A. 

800

B. 

837

C. 

1000

D. 

1200

Right Option : B

EXPLANATION
Explain TypeExplanation Content
Text

Total;student=100%Fail;student=21%=189Number;of;passed;student=79%frac{189*72}{21}=27*24=648Total;number;will;be648+189=837

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