Question

5) A five hundred rupee note was changed to fifty and hundred rupee notes , seven notes in all .



a) How many hundred rupee note were there ?


b) How many fifty rupee note were there ?

( Hint : Take the number of hundred rupee notes as x )​

Answer 1

Answer:

90 ,20,25

Step-by-step explanation:

this is the answer

Answer 2

Step-by-step explanation:

Let the hundread rupee note be x and fifty rupee note be y

then x + y = 7 (eq 1)

100x + 50y = 500 ( eq 2)

now mutiply eq 1 by 100

100x +100y = 700 (eq 3)

Using elimination method

subtract (eq 1) from (eq 3)

100x + 100y = 700

_ ( 100x + 50y = 500 )

this gives 50y = 200

y = 4

now putting the value of y in ( eq 1)

x + y = 7

x + 4 = 7

this gives x = 3

Hence there are 3 notes of 100 and 4 notes of 50

a) 3 notes of hundread

b) 4 notes of fifty