Question

jagdish has three more ₹5 coins than ₹10 coins.if he has ₹195 worth of money in total,how many of each kind of coins does he have?

Answer 1

Let the number of ten rupee notes= x

therefore , number of five rupee notes = x+3

Total money = 10*(number of ten rupee notes ) + 5 (number of five rupee notes)
= 10*x + 5*(x+3)
=10x +5x +15
=15x + 15
therefore ,15x+15 = 195
15x = 195 - 15
15x = 180 or x = 180/15
x=12
Therefore number of ten rupee notes= 12
hence , number of five rupee notes
= x+3=12 +3=15

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Answer 2

Let x be the 10 Rs notes and y be the 20 Rs rupee notes

Given that total number of notes = 50

x + y = 50 -----------------(1)

And a sum of 800 is in the form of denominations of Rs10 and Rs 20.

10x + 20y = 800

x + 2y = 80 -------------(2)

From (1) and (2) we get

x = 20 and y = 30

∴ 10 Rs notes = 20

 20 Rs notes = 30.