A sum of ₹800 is in the form of denominations of ₹10 and ₹20. If the
total number of notes be 50, find the number of notes of each type.
Answers
Answer:
20 notes of Rs 10
and 30 notes of Rs 20.
Step-by-step explanation:
Given :
Sum = Rs. 800
Denominations of = Rs. 10 and Rs. 20.
Total notes = 50
To find :
Number of each type of notes
Solution :
Let y denote = Rs 10.
Total notes = 50.
Number of notes of Rs 20 = (50 – y)
Total sum of money = Rs 800
⇒ 10y+ 20 (50 – y) = 800
⇒ 10y+ 1000 – 20y= 800
⇒ – 10y = 800 – 1000
⇒ – 10y= – 200
⇒ y = 20
Rs. 10 notes = 20
Rs. 20 notes -
⇒ 50 – y
⇒ 50 – 20
⇒ 30
Therefore, 20 notes of Rs 10
20 notes of Rs 10 and 30 notes of Rs 20.
Answer:
20 notes of Rs 10 and 30 notes of Rs 20.
Step-by-step explanation:
Let y denote = Rs 10
Total notes = 50
Number of notes of Rs 20 = (50 – y)
Total sum of money = Rs 800
=> 10y+ 20 (50 – y) = 800
=> 10y+ 1000 – 20y= 800
=> – 10y = 800 – 1000
=> – 10y= – 200
=> y = 20
Rs. 10 notes = 20
Rs. 20 notes = 50 – y
=> 50 – 20 => 30
Hence,
20 notes of Rs 10 and 30 notes of Rs 20.