Question

if the number of dective bulbs in a shop are 20 and percentage of good bulb are 95% find the total number of bulbs in the shop
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Answer 1

Answer:

percentage of good bulbs are 95%

percentage of deactive bulbs (100-95)%=5%

5%=20

100%=20×100/5=400

total number of bulbs in the shop 400

Answer 2

Answer:

400

Step-by-step explanation:

Let total no. of bulbs be x

No. of defective bulbs =20

Percentage of defective bulbs = Total percentage - percentage of good bulbs

                  =100% -95% =5%

According to ques.

 5% of x = 20

5  * x=20

100

x = 20*100

         5

x=400Ans