Question

As part of a math lesson on probability, Mr. Keen rolled a standard die 30 times. He predicted the die would land on three 5 times. He actually rolled a three 8 times. What is the percent error for his prediction?

Answer 1

Using it's concept, it is found that the percent error for this prediciton is of 60%.

What is the percent error?

The percent error of an amount is the absolute value of the difference between the actual amount and the expected amount, multiplied by 100% and divided by the expected amount.

In this problem:

• The expected amount was of 5 times.

• The actual amount was of 8 times.

Hence, the percent error is given by:

P = |8 - 5|/5 x 100% = 3/5 x 100% = 0.6 x 100% = 60%.

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