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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Answered by
1
Let the number of Rs 50 notes and Rs 100 notes be x and y respectively.
According to the question, x + y = 25 ...
(i) 50x + 100y = 2000 ...
(ii) Multiplying equation
(i) by 50, we get 50x + 50y = 1250 ...
(iii) Subtracting equation
(iii) from equation
(ii), we get 50y = 750 y = 15 Putting this value in equation
(i), we have x = 10 Hence, Meena has 10 notes of Rs 50 and 15 notes of Rs 100.
Answered by
4
Let the Rs.50 notes by x and Rs.100 notes be y.
∴ Total notes =(x+y) notes
Total notes (given) =25 notes
∴(x+y)=25⟶(i)
Total money Meena has=50x+100y
Total money (given) =Rs.2000
On simplification,
x+2y=40⟶(ii)
On substraction (i) and (ii),
−y=−15
y=15 notes
putting y in (i)
x+y=25
x=10 notes
∴ Rs.50 notes=10 notes.
Rs.100 notes=15 notes.
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