A fair coin is tossed 3 times in a row what is the probability that heads appears exactly 2 times
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I don't understand sorry
Have you learned about combinations and factorials?
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Well the answer is 3/8
What's the probability that heads appears on only the last toss
Let H represent an outcome of heads and T represent an outcome of Tails
For three tosses of the coin all the possible outcomes are:
These eight possible outcomes are the sample space.
To find the probability of tossing heads exactly twice look down the sample space list and
find any outcome that has exactly two H's. The possibilities are T-H-H, H-T-H, and H-H-T.
This means that three of the eight possible outcomes contain exactly two heads. Therefore,
the probability of throwing exactly two heads in three tosses of the coin is 3 out of 8,