Question

a coin is tossed until a head appears or until the coin has been tossed 5 times .if a head does not occur on the first two tosses then the probability that the coin will be tossed 5 times is​

Answer 1

Total Possible cases

{H, TH, TTH}

P(H)=1/2

P(TH)=21×21=41

P(TTH)=21×21×21=81

P(coin is tossed thrice) =P(TTH)+P(TTT) =1/4

P(coin is tossed thrice | first toss not head) =1/21/4=21

Answer 2

Answer:

ans -1:2

Step-by-step explanation:

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