CBSE Class 10 Answered
In an envelope there are some 5 rupee notes and some 10 rupee notes.Total amount of these notes together is 350 rupee . Number of 5 rupee notes are less by 10 than number of 10 rupee notes .Then find the number of 5 rupee and 10 rupee notes .
Asked by hridaymourya | 10 Dec, 2018, 07:47: PM
Expert Answer
Let x be the number of notes of Rs. 5 and y be the number of notes of Rs. 10.
According to the question,
5x + 10y = 350
x + 2y = 70.......(i)
Also,
x = y - 10
x - y = -10 ....(ii)
Subtract (ii) from (i)
we get
3y = 60
y = 20
Put it in (i) we get
x = 10
Hence, the number of Rs. 5 notes are 10 and the number of Rs. 10 notes are 20.
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