Shruthi has some 2 rupee and 5 rupee coins in her money box . She exchanged them for some 10 rupee coins . if the number of 5 rupee coins is one less than the number of 2 rupee coins then the number of 5 rupee coins is .....?
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5 rupee coin are 4
4×5=20. (1)
two rupee coin 5
5×2=10. (2)
adding 1&2
30 and can be exchanged in 10 rupee coin
4×5=20. (1)
two rupee coin 5
5×2=10. (2)
adding 1&2
30 and can be exchanged in 10 rupee coin
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