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suppose,
no. of 1 Rs. coin is x.
no. of 2 Rs. coin is y.
than in 1st situation,
x=5y .....(1)
and in 2nd situation,
x+2y=70 .....(2)
than 5y+2y=70
7y=70
y=10
in ....(2),
x+2(10)=70
x+20=70
x=50
so, 1Rs. coin is 50 and
2 Rs. coin is 10.
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