Question

A man has certain notes of denominations of 20 rupees and 5 rupee which amount to rupees 380. if the number of notes of each kind is interchange the amount to rupees 60 less as before .find number of notes each denomination

Answer 1

Answer: This is the answer

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Step-by-step explanation:

let the no of rs20 notes be x

and that of rs.5 be y

then acc to the ques,

20x+5y=380

20y+5x=380-60

           =320

on solving the above linear equations in 2 variables we get,

x=16 y=12

hence, originally there were 16 notes of Rs20 and 12 notes of Rs.5

Answer 2

Answer:5 rupee----12

             20 rupee---16

Step-by-step explanation:

Let him have x 20 rupee notes and y 5 rupee notes.

ATP,

20x+5y=380

4x+y=76------------------(1)

Also,

20y+5x=380-60

20y+5x=320

4y+x=64

4x+16y=256--------------------------(2)

Subtracting (1) from (2);

15y=180

y=12

x=(76-y)/4=64/4=16

Thus there are 12 five rupee notes and 16 twenty rupee notes.