Question

meena went to a bank to withdraw Rs. 2000. she asked the casier to give her Rs. 50 and Rs.100 notes only meena got 25 notes in all find how many notes of Rs. 50 and RS.100 she received.

DO IT QUESTION BY ELIMINATION METHOD FOR CLASS 10TH ​

Answer 1

Answer: 10 Rs.50 notes. ; 15 Rs.100 notes

Explanation:

Let the number of RS 50 notes received be x

Let the number of RS 100 notes received be y

Since Meena got 25 notes in total, this means that:

x + y = 25 ...... equation i

Since Meena went to a bank to withdraw Rs. 2000. This means:

50x + 100y = 2000 ...... equation ii

Combining both equations

x + y = 25 ....... i

50x + 100y = 2000 ...... ii

Multiply equation i by 50

Multiply equation ii by 1

50x + 50y = 1250 ...... iii

50x + 100y = 2000 ...... iv

Subtract equation iii from iv

50y = 750

y = 750/50

y = 15.

Therefore, since x + y = 25

x + 15 = 25

x = 25 - 15

x = 10

The number of Rs.50 notes received is 10

The number of Rs.100 notes received is 15.