a sum of rupees 800 in the form of denomination of rs 10 and 20 if the total no of notes is 50 find the no of each types of notes
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Answer:
20 notes of Rs 10 and 30 notes of Rs 20.
Step-by-step explanation:
Let there be X notes of Rs 10.
Total number of notes = 50.
∴ Number of notes of Rs 20 = (50 – x)
Total sum of money = Rs 800
∴ 10x+ 20 (50 – x) = 800
⇒ 10x+ 1000 – 20x = 800
⇒– 10x = 800 – 1000
⇒ – 10x= – 200
⇒x= 20
∴ 50 – x = 50 – 20= 30
So, there are 20 notes of Rs 10 and 30 notes of Rs 20.
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