Question

Martha estimated there were 97 marbles in a jar for a contest. The actual number of marbles in the jar was 119. What was the percent error of Martha's estimation?

Answer 1

Percent error of Martha's estimation is 18.48%.

Explanation:

The number of estimated marbles in a jar = 97

The number of actual marbles in a jar = 119

Now, ERROR = ACTUAL VALUE - ESTIMATED VALUE

= 119 - 97 = 22

So, the error in counting marbles = 22 marbles.

Now,
`\textrm{ERROR PERCENTAGE} = \frac{\textrm{Error Value}}{\textrm{Actual Value}} * 100`

`= (22)/(119) * 100 = 18.48`

or, Percentage error = 18.48%

Hence, percent error of Martha's estimation is 18.48%.