Answer :

jeeturawat2919

Step-by-step explanation:

the correct answer is 165

bhavyagrawal

Answer:

Rs 165

Step-by-step explanation:

Let her pocket money be equal to y

The fraction of money left with her = 1 - 3/7 = 4/7

so, (4/7) y = 220

y = 220 x 7/4

y = 385

So cost of math book = 385 x 3/7

= Rs 165

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