Question

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18. Meena went to a bank to withdraw Rs 2000. She asked the cashier to give her

Rs 50 and Rs 100 notes only. Meena got 25 notes in all Find how many notes Rs 50 and
Rs 100 she received.
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Answer 1

x = 25-15 = 10No. of Rs. 50 notes = 10

Let no. of Rs. 50 notes = x    no. of Rs. 100 notes = yTotal notes = 25⇒ x + y = 25⇒ x = 25-ytotal amount only in Rs. 50 notes = 50xtotal amount only in Rs. 100 notes = 100yTotal amount = 2000⇒ 50x + 100y = 2000⇒50(25-y) + 100y = 2000⇒50×25 - 50y + 100y = 2000⇒1250 +50 y = 2000⇒ 50y = 2000-1250 = 750⇒ y = 750/50 = 15    x = 25-15 = 10No. of Rs. 50 notes = 10No. of Rs. 100 notes = 15

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Answer 2

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