I get 10 chocolates for ₹ 100 and my friend gets 15 for ₹ 120 from another store. If I buy my chocolates from the same store as my friend, how much less would I have to pay for each chocolate that I buy?

₹8

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₹8.33

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₹2

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₹5

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Solution

The correct option is C ₹2
Cost of 10 chocolates = ₹ 100
$\Rightarrow$ Cost of 1 chocolate = ₹ 10
$∴$ Presently, I pay ₹ 10 for each chocolate I buy.

For the friend,
Cost of 15 chocolates = ₹ 120
$\Rightarrow$ Cost of 1 chocolate = ₹ 8
$∴$ At the other store, each chocolate costs ₹ 8.

If I buy from the other store, I need to pay ₹ 10 - ₹ 8 $\Rightarrow$ ₹ 2 lesser.

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