Among 132 examinees of a certain school,the r | vedclass

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(D) Let the number of successful students be $9x$ and unsuccessful students be $2x$.Given that the total number of examinees is $132$,we have:$9x + 2x

Vedclass · Accepted Answer

$28:5$

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(D) Let the number of successful students be $9x$ and unsuccessful students be $2x$.Given that the total number of examinees is $132$,we have:$9x + 2x = 132$$11x = 132$$x = 12$Therefore,the number of successful students is $9 	imes 12 = 108$ and the number of unsuccessful students is $2 	imes 12 = 24$.If $4$ more students had passed,the new number of successful students would be $108 + 4 = 112$.The number of unsuccessful students would decrease by $4$,so it would be $24 - 4 = 20$.The new ratio of successful to unsuccessful students is $112:20$.Dividing both terms by $4$,we get $28:5$.

Among $132$ examinees of a certain school,the ratio of successful to unsuccessful students is $9:2$. Had $4$ more students passed,then the ratio of successful to unsuccessful students would have been:

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