Question

A fair coin is tossed 3 times in a row. What is the probability that heads appears on only the last toss? A. `1/8` B. `3/8` C. `3/16` D. `3/4`

Answer 1

1/8

Explanation:

Answer 2

P(heads appears on only the last toss) =
`(1)/(8)`

Explanation:

A fair coin is tossed 3 times in a row.

When a coin is tossed we get a tail or head T or H

The possible outcomes of 3 coins are

T T T , H H H , T H H, H T H, H H T, H T T , T H T, T T H

So total of 8 possible outcomes

heads appears on only the last toss , first and second toss should be tail

So its T T H. Only one possibility

Probability(any event) = number of outcomes / total outcomes

P(heads appears on only the last toss) =
`(1)/(8)`