you flip a coin. what is p(not heads)? write your answer as a percentage rounded to the nearest tenth. %

Explanation:

Step1: Identify total and favorable outcomes

A coin - flip has 2 possible outcomes (heads or tails). The event of "not heads" is the event of getting tails, which is 1 outcome.

Step2: Calculate probability

The probability formula is $P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. So $P(\text{not heads})=\frac{1}{2}$.

Step3: Convert to percentage

To convert $\frac{1}{2}$ to a percentage, we multiply by 100: $\frac{1}{2}\times100 = 50.0%$.

Answer:

50.0%