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A bill for Rs 70 is paid by means of Rs ...

A bill for Rs 70 is paid by means of Rs 10 notes and Rs 20 notes. Five notes are used in all. If m is the number of Rs 10 notes and n is the number of Rs 20 notes, then _____

A

` m + n = 5, 2m + n = 8`

B

`m - n = 5, m + 2n = 7`

C

`m + n = 5, m + 2n = 7 `

D

` m - n = 5, m + 2n = 8`

Text Solution

Verified by Experts

The correct Answer is:
C
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