How to solve questions 10 ,11and 13

Dear Student

Please find below the solution to the asked query:

10.

Given  : A  shop owner bought a packet of 50 cookies for Rs 187.50 and is selling them at a 20% profit.

So,

Selling price of 50 cookies  =  187.50 + 20% of 187.50 = 187.50 + 20 × 187.50100 = 187.50 + 187.505 = 187.50 + 37.50 = 225
Then ,

Selling price of a cookie = 22550 = Rs . 4.5

Therefore,

Shabnam can buy total number of cookies if she has Rs 36 = 364.5 = 8                                              ( Ans )

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