Probability 3 Question 14

14. A fair coin is tossed repeatedly. If tail appears on first four tosses, then the probability of head appearing on fifth toss equals

(a) 12

(b) 132

(c) 3132

(d) 15

(1998, 2M)

Show Answer

Solution:

  1. The event that the fifth toss results in a head is independent of the event that the first four tosses result in tails.

Probability of the required event =1/2



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