Question

A Sum of 're.500 is in the form of denominations of 're.5 and 're.10 if the total no. of note is 90 find the no. of notes of each type

Answer 1

Answer:

number of 10 rupees note is 10 and 5 RS

Step-by-step explanation:

let number of 5 rupees note be x

let number of 10 rupees note be y

total number of notes=90

Atq

x+y=90 -1st

5x+10y=500-2nd

reduce 2nd equation

x+y=90

x+2y=100

=change the sign and solve by elimination

-y=-10

y=10

x+y=90

x=90-10

x=80

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Answer 2

Step-by-step explanation:

Let the Rs. 5 = x

Rs.10 be 90 -x

sum of numbers of notes is 90

So the value of Rs. 5 = 5x

and the value of Rs.10 = 10 ( 90-x)

= 900 - 10x

Sum of Rs. 500

5x + 900-10x = 500

5x +900 = 500

5x = 900 -500

5x = 400

x = 400 /5

x = 80

Number of notes of rs.5 = 80

Number of notes of rs. 10 = 10