Book Maths Puzzle

Rao has 14 currency notes in his pocket containing of only rs 20 notes and rs 10 notes.The total money value of the notes is rs 230 the number of rs 10 notes that rao has is:

Read Solution (Total 1)

no. of 10 rupees notes=x
no. of 20 rupees notes=y
x+y=14
10x+20y=230
solving,x=5
y=9
so,the number of rs 10 notes that rao has is 5.
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Book Other Question

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