Question

In a lot of 1000 bulbs 20 are defective what is the probablity that a bulb chosen at random is not defective

Answer 1

Answer:

total events : 1000

defective bulb : 20

p(not defective ):

total event - defective /total event

1000-20/1000

980/1000

ans:49/50

Step-by-step explanation:

Answer 2

Total no. of bulbs                         = 1000

The bulbs that are defective       = 20

The bulbs that are not defective = 1000-20 = 980

Therefore, p(choosing a bulb at random that is not defective) = 980/1000 = 49/50

Mark as brainlist pls