Question

1. A coin is tossed thrice what is the probability of obtaining
a. At least 2 Tails
b. At most three Heads
​

Answer 1

Answer:

atleast 2 tails

Explanation:

coz when we tossed it thrice come and it shows tails twice

Answer 2

Answer:

Sample space: {HHH,HTH,THH,TTHHHT,HTT,THT,TTT}

Total number of possible outcomes=8

(1) A getting at least two heads

P(A)=P(getting two heads)+P(getting 3 heads)

=83+81

(using formula=P(event)=Total no. of possible outcomesNo. of favourable outcomes

P(A)=84=21

∴P(A)=21

(2) B: getting exactly two heads

P(B)=3/8

(3) C: getting almost one head

P(C)=P(getting no head)+P(getting 1 head)

=81+83=84=21

P(C)=21.

Answered By xGuitarx