A purse contains some 25p coins and some 50p coins. The total amount in the purse is Rs 25. If the no of 50 paise coins is double the no of 25 p coins, how many of each coins is there in the purse?
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Let no: of 25p coins = x &
50p coins = y also
rs 25= 2500p
25x + 50y = 2500.......(1)
y = 2x.........(2)
solving eq (1) & (2), we get
x + 2y = 100
2x - y = 0 ...... × 2
5x = 100 thus x = 20
y = 2x = 2 (20) = 40
Answer is. 25p coins = 20
50p coins = 40
50p coins = y also
rs 25= 2500p
25x + 50y = 2500.......(1)
y = 2x.........(2)
solving eq (1) & (2), we get
x + 2y = 100
2x - y = 0 ...... × 2
5x = 100 thus x = 20
y = 2x = 2 (20) = 40
Answer is. 25p coins = 20
50p coins = 40
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