Question

Three unbiased coins are tossed together. Find the probability of getting:
(a) All heads

(b) Two heads

(c) Atmost two heads

(d) Getting a head and tail alternately(MOST IMPORTANT)
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Answer 1

When 3 unbiased coins are tossed, the sample space is

{HHH, HTH, HHT, THH, THT, HTT, TTT]= 8

Event of getting two heads={HHT, HTH, THH}=3

p(Two heads)=3/8

event of getting at least two heads (two or more than two heads)={HHH, HTH, HHT, THH}=4

At least (two heads)=4/8=1/2

Event of getting no heads={TTT}=1

p(no heads)=1/8

Answer 2

Answer:

JioTotal = Outcomes HHH,TTT,HTH,THT,TTH,HHT,HTT,HHT,THH,HTT

a)All heads

1 /8

b)Two heads

4/6

c)Almost two heads

5/6

d)2/8 =1/4

hope it helps

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