How many notes?
Algebra
Level
1
A man has a combination of $5 and $10 notes. If the total number of notes is 20, and the total value of money is $120, what is the quantity of $10 notes?
The answer is 4.
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1 solution
Let there be x bills of $10.
Therefore (20-x) $5 bills are present.
As per the statement,
10 x + 5 (20-x) = 120
5x + 100. = 120
X = 4.