Latest Book Aptitude Question SOLUTION: The shopkeeper charged 12 rupees for a bunch of chocolate. but bargained to shopkeeper and got two extra ones, and that made them cost one rupee for dozen less than first asking

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(#M40153436) BOOK Category question Keep an EYE

The shopkeeper charged 12 rupees for a bunch of chocolate. but bargained to shopkeeper and got two extra ones, and that made them cost one rupee for dozen less than first asking price .
How many chocolates I received in 12 rupees ?

Asked In Book harinee (8 years ago)

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Devendra Marghade  (8 years ago)

18 chocolates

If originally one could get 'n' chocolates in 12 Rs., then
Cost of 1 dozen or 12 chocolates=12*(12/n)=144/n
With 2 chocolates extra in 12 Rs., Cost of 1 dozen chocolates=12*12/(n+2)=144/(n+2)
According to given condition (144/n) - [144/(n+2)]=1 or
n^2+2n-288=0, (n-16)(n+18)=0, So n=16,
With two extra chocolates in 12 Rs. so total,16+2=18 chocolates

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