Rani has Rs.800 in the denominations of 10Rs and 20 Rs. if the total number of notes is 50, find the number of notes of each type.
Friends i know the answer but not explanation and step by step instructions. the answer was 20,30
it is important to me so please help me by the perfect explanation
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Step-by-step explanation:
⇒ Let the number of notes of Rs.10 be x
∴ The number of notes of Rs.20=50−x
According to the given condition,
⇒ 10x+20(50−x)=800
⇒ 10x+1000−20x=800
⇒ −10x=800−1000
⇒ −10x=−200
∴ x=
10
200
=20
∴ The number of notes of denomination of Rs.10=20
⇒ The number of notes of denomination of Rs.20=50−20=30
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