Answer / priyanka

Suppose total 100 people has entered the store.
of these 60 people will purchase one item.
15% of these 60 people = 9 people will buy glue.

Hence answer is 9% that is c.

Answer / sonali

the ratio is asked with respect to the number of ppl that
entered the store ie say X
thus it would be ((60X/100)*(15/100))/X=9%

if the ratio was with respect to ppl who purchased some item
ie 60%X then it would be ((60X/100)*(15/100))/(60X/100)=15%

but according to ques it would be 9%

Answer / prasanth

{(60%n)*15%/(60%n)}*100=15%

ans: e

Answer / anonymous

15%

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