Question

Cost price of 100 bulbs is Rs. 1000. Out of 100 bulbs, 40 were found defective and sold at a loss of 5%. The remaining bulbs were sold at a profit of 10% each. What is the total selling price of 100 bulbs? * 1 point Rs.1200 Rs. 1040 Rs.1060 Rs. 960​

Answer 1

Answer:

Step-by-step explanation:

Cost of 100 bulbs = ₹ 1000

Cost of 1 bulb= 1000 ÷ 100 =  ₹10

Defective bulbs:

Cost of 40 bulbs = 40*10 =  ₹400

Loss% = 5%

Selling price of 40 bulbs = $\frac{100-loss}{100}*CP$

                                        $=\frac{100-5}{100}*400\\\\=\frac{95}{100}*400\\\\= 380$

Selling price of 40 bulbs =  ₹380

Good bulbs:

CP of 60 bulbs = 60*10 =  ₹600

Gain% = 10%

Selling price of 60 bulbs = $\frac{100+gain}{100}*CP$

                                         $=\dfrac{100+10}{100}*600\\\\=\dfrac{110}{100}*600\\\\= 660$

Selling price of 60 bulbs =  ₹660

Selling price of 100 bulbs = 380 + 660 = ₹1040