Question

sum of Rupees 1000 is in the form of notes of denominator of rupees 10 and rupees 20. If the total number of notes is 60 , find the number of notes of each type.

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Answer 1

Step-by-step explanation:

let the value of rs 10 = 10x

the value of rs 20 = 60 - x

Number of notes of rs 10 = 10x

Number of notes of rs 20 = 20 ( 60 - x ) = 1200 - 20x

A/Q

10x + 1200 -20x = 60

- 10x = 60 - 1200

-10x = - 1140

x = 114

Answer 2

Answer:

Let no.of notes of rupees 10 is X and

no. of notes of rupees 20 is 60-X.

sum of 10 rupees's notes is 10×X

and sum of 20 rupees's notes is 20×(60-X)

then,

sum of all notes =1000

10×X +20×(60-X) =1000

10X + 1200-20X =1000

1200 -10X =1000

10X =1200-1000

10X =200

X=200/10

X=20

no. of notes of rupee 10 is 20.

and no.of notes of rupee 20 is (60-20)

=40