A man has in all Rs. 640 in the denominations of one-rupee, five-rupee and ten-rupee notes. The number of each type of notes are equal. What is the total number of notes he has?
A. 150
B. 120
C. 100
D. 90
Answer: Option B
Solution(By Examveda Team)
\[\begin{array}{*{20}{c}} {}&{{\text{Rs}}{\text{. 1}}}&:&{{\text{Rs}}{\text{. 5}}}&:&{{\text{Rs}}{\text{. 10}}}&{} \\ {{\text{Number of notes}}}&1&:&1&:&1&{} \\ {}&x&:&x&:&x&{ = \boxed{3x}{\text{ number of notes}}} \\ {{\text{So, Value}}}&x&:&{5x}&:&{10x}&{ = \boxed{16x}{\text{ value of notes}}} \end{array}\]$$\eqalign{ & x + 5x + 10x = 640 \cr & 16x = 640 \cr & \boxed{x = 40} \cr & \therefore {\text{Number of notes }}40 \times 3 = 120 \cr} $$
Related Questions on Ratio
If a : b : c = 3 : 4 : 7, then the ratio (a + b + c) : c is equal to
A. 2 : 1
B. 14 : 3
C. 7 : 2
D. 1 : 2
If $$\frac{2}{3}$$ of A=75% of B = 0.6 of C, then A : B : C is
A. 2 : 3 : 3
B. 3 : 4 : 5
C. 4 : 5 : 6
D. 9 : 8 : 10
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