Question

Articals are bought at 45 rs per dorzen and sold at 85 rs per score. Find the gain or loss per cent

Answer 1

Answer:

cost of larticle45/12=3 3/4

sp. 85/20=4 1/4

Profit = 1/2

%Profit = 0.5x100/3.75=50/3.75

13.3%

Answer 2

$cost \: prize \: per \: dozen = rs45 \\ cost \: prize \: of \: one \: article = \frac{45}{12} = 3.75 \\cp \: of \: twenty \: articles = 3.75 \times 20 = rs75 \\sp \: per \: score = 85 \\ since \: sp > cp \\ profit = sp - cp = 85 - 75 = 10 \\ profit \: percent = \frac{profit}{cp} \times 100\% \\ = \frac{10}{75} \times 100\% \\ = 7.5\%$