Question

A shopkeeper purchased 200 bulbs for Rs 10 each. However, 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs 12 each. Find the gain or loss $\%$. [4 MARKS]

Answer 1

Concept : 1 Mark
Application: 1 Mark
Calculation : 2 Marks

Cost price of 200 bulbs $=Rs200\times 10=Rs2000$.

5 bulbs were fused. Hence, number of bulbs left = 200 - 5 = 195

These were sold at Rs 12 each.

The SP of 195 bulbs $=Rs.195\times 12=Rs2340$

Here $SP>CP.\Rightarrow Profit$

$\therefore$ Profit= Rs 2340 - Rs 2000 = Rs 340.

i.e., On Rs 2000, the profit is Rs 340.

$Profit\%=\frac{Profit}{C.P}\times 100$

$i.e.,Profit\%=\frac{340}{2000}\times 100$

$\therefore Profit\%=17\%$