Two unbiased coins are tossed. What is the probability of getting at most one head?

To solve this problem, we first need to understand all the possible outcomes when two unbiased coins are tossed. They are: HH, HT, TH, TT.

Step 1: Identify the total number of outcomes. In this case, there are 4 possible outcomes.

Step 2: Identify the favorable outcomes. The question asks for the probability of getting at most one head. This means we could have either no heads or one head. The outcomes that satisfy this are: TT, HT, TH.

Step 3: Calculate the probability. The probability of an event is given by the number of favorable outcomes divided by the total number of outcomes.

So, the probability of getting at most one head is 3/4 or 0.75.