We are tossing three different coins, so there are 2 possibilities (heads or tails) for each coin. The total number of possible outcomes is:
2 * 2 * 2 = 8.
These 8 outcomes are:
HHH
HHT
HTH
HTT
THH
THT
TTH
TTT
A. Probability of getting exactly two heads:
We need to count the outcomes with exactly two heads. These are:
HHT
HTH
THH
There are 3 outcomes with exactly two heads. The probability is the number of favorable outcomes divided by the total number of outcomes:
P(exactly two heads) = 3/8.
B. Probability of getting at least two heads:
At least two heads means we have either two heads or three heads. The outcomes with at least two heads are:
HHH
HHT
HTH
THH
There are 4 outcomes with at least two heads. The probability is:
P(at least two heads) = 4/8 = 1/2.
C. Probability of getting at least two tails:
At least two tails means we have either two tails or three tails. The outcomes with at least two tails are:
HTT
THT
TTH
TTT
There are 4 outcomes with at least two tails. The probability is:
P(at least two tails) = 4/8 = 1/2.
Final Answers:
A. P(exactly two heads) = 3/8
B. P(at least two heads) = 1/2
C. P(at least two tails) = 1/2