Question

A man brought 200 bulbs for Rs.10 each and sold at the rate of Rs.15 each. Find his profit % if 10 bulbs are fused and thrown away?

Answer 1

cp of 1 bulb=10
cp of 200 bulb=2000
sp of 1 bulb =15
sp of 190 bulbs=2850
profit=850
profit %=850/2000*100
=42.5%

Answer 2

A man brought 200 bulbs each for 10r.
200 × 10
=2000

Ten bulb fused and thrown
So 10 × 10
=100

2000 - 100
1900

Total Bulb he have 190
So each he sold at price of 15 rupees

190 × 15
= 2850

The C.P is 2000
S.P is 2850

So he get profit of rupees 850

Profit % = Profit×100÷ C.P

$\frac{850 \times 100}{2000}$
$\frac{85000}{2000}$
$= 42.5$%