Question

On tossing three coins simultaneously find the probabolity
of getting
(i) 3tails (ii) no tail (iii) 2tails (iv) 2heads and 1tail (v) atleast one head (vi) atmost one tail​

Answer 1

Answer:

Sample space = HHH, HHT, HTT, HTH, TTT, TTH, THT, THH = 8

i)Favorable outcomes = 1

Probability = 1/8

ii)Favorable outcomes = 1

Probability = 1/8

iii)Favorable outcomes = 3

Probability = 3/8

iv)Favorable outcomes = 2

Probability = 2/8 = 1/4

v)Favorable outcomes = 7

Probability = 7/8

vi)Favorable outcomes = 4

Probability =4/8 = 1/2