Q. 44

Mark the correct alternative in each of the following:

A flash light has 8 batteries out of which 3 are dead. If two batteries are selected without replacement and tested, the probability that both are dead is

A. 3/28

B. 1/14

C. 9/64

D. 33/56

Answer :

Total Number of Batteries = 8


Total Number of Dead Batteries = 3


Now Let,


M = Event of selecting the first dead battery



N= Event of selecting the second dead battery


(Without replacement)


P(Both dead batteries are selected) = P(M) P(N)



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