The number of students who didn't pass in any of the area is how many times to that of who pass in all the three areas?

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Solution

The correct option is A 12
$\frac{n u m b e r o f s t u d e n t s w h o d i d n^{'} t p a s s i n a n y o f t h e a r e a s}{n u m b e r o f s t u d e n t s w h o p a s s i n a l l t h e t h r e e a r e a s} \frac{120}{10} = 12$

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The number of students who didn't pass in any of the area is how many times to that of who pass in all the three areas?

The correct option is A 12number of students who didn′t pass in any of the areasnumber of students who pass in all the three areas12010=12

The correct option is A 12
$\frac{n u m b e r o f s t u d e n t s w h o d i d n^{'} t p a s s i n a n y o f t h e a r e a s}{n u m b e r o f s t u d e n t s w h o p a s s i n a l l t h e t h r e e a r e a s} \frac{120}{10} = 12$