Question

A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that all the four bulbs are defective?

Answer 1

Answer:

Step-by-step explanation:

Outcomes=9

P(E)=(getting good bulbs)=5/9

P(notE)=(getting defective bulbs)= 1-5/9

                                                      =4/9

PLZ MARK THIS AS BRAINLIEST.....

Answer 2

Answer:

Step-by-step explanation:

total no of outcomes n(S)=9c4

defective outcomes n(E)=4c4

so

the  probability of getting four defective=4c4/9c4

=1/126