Question

Meena went to a bank to withdraw Rs.2000. She asked the cashier to give 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.

Answer 1

Let no. of Rs. 50 notes = x
    no. of Rs. 100 notes = y

Total notes = 25
⇒ x + y = 25
⇒ x = 25-y

total amount only in Rs. 50 notes = 50x
total amount only in Rs. 100 notes = 100y
Total amount = 2000
⇒ 50x + 100y = 2000
⇒50(25-y) + 100y = 2000
⇒50×25 - 50y + 100y = 2000
⇒1250 +50 y = 2000
⇒ 50y = 2000-1250 = 750
⇒ y = 750/50 = 15
    x = 25-15 = 10

No. of Rs. 50 notes = 10
No. of Rs. 100 notes = 15

Answer 2

Answer:

Step-by-step explanation:

Given :-

Meena went to a bank to withdraw Rs.2000.

She asked the cashier to give Rs. 50 and Rs. 100 notes only .

Meena got 25 notes in all .

Solution :-

Let the number of Rs 50 notes and Rs 100 notes be x and y.        

According to the question,                  

⇒ x + y = 25 ... (i)                  

⇒ 50x + 100y = 2000 ... (ii)                  

Multiplying equation (i) by 50, we get                  

⇒ 50x + 50y = 1250 ... (iii)                  

Subtracting equation (iii) from equation (ii), we get                  

⇒ 50y = 750                  

⇒ y = 15                  

Putting this value in equation (i), we have

⇒ x = 10  

               

Hence, Meena has 10 notes of Rs 50 and 15 notes of Rs 100.