a) 18.5%
b) 21%
c) 23%
d) 27%
Answer: b
Explanation: Ratio of CP = 1 : 2 : 4
Let cost of,
A = x
B = 2x
C = 4x
Ratio of Number of sell = 2 : 5 : 2
Let number of items sold be,
A = 2y
B = 5y
C = 2y
Total cost (A + B + C),
= (2xy + 10xy + 8xy)
= 20xy
Profit of A = 0.2xy
Profit of B = 2xy
Profit of C = 2xy
Total profit = 4.2xy
% Profit = $$\frac{{4.2{\text{xy}} \times 100}}{{20{\text{xy}}}} = 21\% $$
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