Question

follow these steps to perform a probability experiment.

1. press the button to flip the coin 5 times.
2. what is the experimental probability of flipping a head after five flips of the coin? 2/5
3. press the button to flip the coin 15 more times.
4. what is the experimental probability of flipping a head after twenty flips of the coin?

event count
heads 9
tails 11
total 20
9/11
9/20
1/2
check

Explanation:

Step1: Recall probability formula

The formula for experimental probability is $P(A)=\frac{\text{Number of times event }A\text{ occurs}}{\text{Total number of trials}}$.

Step2: Identify values from table

The number of heads (event of interest) is 9, and the total number of coin - flips is 20.

Step3: Calculate probability

Substitute the values into the formula: $P(\text{head})=\frac{9}{20}$.

Answer:

B. 9/20