Question

) In an envelope there are some 5 rupee notes and some 10 rupee notes. Total amount of
these notes together is 350 rupees. Number of 5 rupee notes are greater by 10 than number
of 10 rupee notes. Then find the number of 5 rupee and 10 rupee notes.​

Answer 1

Answer:

x=30. ,y=20

Step-by-step explanation:

let the no. of Rs. 5 notes be x

let no. of Rs.10 notes be y

cond.I

5x+10y=350---------------eqn 1

cond.II

x-y=10---------------eqn 2

on multiplying by 5 in eqn2

5x+10y=350-----------eqn 1

5x-5y=50--------------eqn3

on sbtracting eqn3 from eqn1

15y=300

y=20

putting the value of y in eqn 2

x-20=10

x=30

hence the no. of rs. 5 notes is 30 and no. of rs. 10 notes is 20.