223,004 views
18 votes
18 votes
As part of a probability experiment for math class, Reid flipped a coin a hundred times. He

predicted it would land on heads 50 times, but it actually landed on heads 40 times. What is
the percent error for Reid's prediction?

If necessary, round your answer to the nearest tenth of a percent.

User Danexxtone
by
2.4k points

2 Answers

6 votes
6 votes

Answer:

25%

Explanation:

we know that you have to do amount of error/ correct amount

so the amount of error is 10 and the correct amount is 40, so its 10/40.

10 divided by 40 is 0.25. They want the answer as a percent, so in order to turn 0.25 to a percent, you have to move the decimal 2 times over. It then turns into 25%

User Raycons
by
3.1k points
17 votes
17 votes

Answer: 18.4%

Explanation:

We can use the given formula to calculate the percent error.

Given:


\displaystyle \text{Percent Error} = \frac{\text{Estimated Number - Actual Number}}{\text{Actual Number}} *100

Substitute known values:


\displaystyle \text{Percent Error} = (50-40)/(40) *100

Subtract:


\displaystyle \text{Percent Error} = (10)/(40) *100

Divide:


\displaystyle \text{Percent Error} = 0.25 *100

Multiply:

Percent Error = 25%

User JustinDanielson
by
3.1k points