# AP BIOLOGY

## HEREDITY

### BASICS OF PROBABILITY

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two fair coins are tossed. What is the probability of getting at most one head? (Hint:Create a sample space)
 A 1/2 B 3/4 C 1/4 D 1
Explanation:

Detailed explanation-1: -For this question, getting at most 1 head means either getting 0 or 1 heads. The probability of getting 0 heads is 1/2 * 1/2= 1/4 and the probability of getting 1 head is 1/2 * 1= 1/2. So the probability of getting at most 1 head is 1/4 + 1/2= 3/4.

Detailed explanation-2: -We have to find the probability of getting at most one head. When a coin is tossed two times. Therefore, the probability of getting at most one head is 3/4.

Detailed explanation-3: -Answer. The at most one head probability of a coin toss will be 3 out of 4 times, or at most one head probability will be 3/4.

Detailed explanation-4: -If two coins are tossed what is the probability that at least one head up? Three of the four possible outcomes have at least one head up, so the probability is 0.75.

There is 1 question to complete.