Question

An unbiased coin is tossed 5 times. if tail appears on first four tosses, then probability of tail appearing on the fifth toss is

Answer 1

Total number of possible outcomes = 2 ( that is, head or tail)

P(tail) = 1/2

Each toss is independent of the one before.

So the probability of the 5th throw of getting a tail is still:

P(tail) = 1/2

Answer: 1/2

Answer 2

Total number of possible outcomes = 2 ( that is, head or tail), P(tail) = ½.

Each toss is independent of the one before.

So the probability of the 5th throw of getting a tail is still: P(tail) = ½.

The probability of tail can be measured by taking fifth time around one before and evaluate it.