ProbabilityHard
Question
A coin is tossed indefinitely. Probability that the fourth head occurs before the sixth toss is equal to -
Options
A.1/16
B.2/16
C.3/16
D.4/16
Solution
First five tosses must contain either 4H + 1T or 5H
⇒ Required probability = P(4H + 1T) + P(5H)
= 5C4 ×
⇒ Required probability = P(4H + 1T) + P(5H)
= 5C4 ×
Create a free account to view solution
View Solution FreeMore Probability Questions
A is one of the 6 horses entered for a race and is to be ridden by one of two jockeys B or C. It is 2 to 1 that B rides ...If p1 and p2 are the probabilities of two independent events then (1 − p1 − p2 + p1p2) is the probability of...Three identical dice are rolled. The probbability that the same number will appear on each of t hem, is...A fair die is thrown twenty times. The probability that on the tenth throw the fourth six appears is-...A coin is tossed three times. The probability of getting all heads or tails only is-...