SOLUTION: If a coin is flipped two times, what is the probability of the coin landing on HEADS at least 1 time? Express your answer as a reduced fraction in the form "A/B".

Question 764498: If a coin is flipped two times, what is the probability of the coin landing on HEADS at least 1 time? Express your answer as a reduced fraction in the form "A/B".
Answer by Edwin McCravy(20055) (Show Source): You can put this solution on YOUR website!

You must get one of these 4 cases:

Case 1. Heads first, heads second.
Case 2. Heads first, tails second.
Case 3. Tails first, heads second.
Case 4. Tails first, tails second.

The first 3 cases are cases when there was at least 1 head.
Only case 4 contains no heads.

The probability is 3 ways out of 4, or 

Edwin

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