Question

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

Answer 1

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%

Answer 2

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%