Question

Brian flips a fair coin 3 times
What is the probability of him getting exactly 2 tails?​

Answer 1

`(3)/(8)`

Explanation:

There are a list of possible outcomes:

• TTT (1)
• TTH (2)
• THT (3)
• THH (4)
• HHH (5)
• HHT (6)
• HTH (7)
• HTT (8)

This represents 8 outcomes.

The only ones that have two tails are:

• TTH (1)
• THT (2)
• HTT (3)

Because there are 3, this means that the probability in a fraction form of Brian getting exactly 2 tails is 3/8. P ( exactly 2 tails) = 3/8.