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3. The probability that a bulb produced by a factory will fuse after certain period of time is 0.05. Find the probability that out of 5 such bulbs a. None fuses b. Not more than 2 fuse c. More than 2 fuse

3. The probability that a bulb produced by a factory will fuse after certain period of time is 0.05. Find the probability that out of 5 such bulbs
a. None fuses
b. Not more than 2 fuse
c. More than 2 fuse

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1 Answers

naitik bhise
14 Points
10 years ago

 

a,P=(1-0.05)^5

b,P=no.of ways of 1 defective bulb+no. of ways of 2defective bulb

p=5C1*0.05*(0.95)^4+5C2*(0.05)^2*(0.95)^3


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