Question

At the school carnival, students are asked to guess the number of marbles in a jar to win a prize. There are 240 marbles in the jar. The closest guess is 280 marbles. What is the percent error of the guess. Explain. Round your answer to the nearest percent.

Answer 1

There is 17% error in the guess.

Step-by-step explanation:

Given,

Number of marbles in jar = Exact value = 240

Closest guess = Approx Value = 280

Percent error = $\frac{|approx-exact}{exact}*100$

Percent error = $\frac{|280-240|}{240}*100$

Percent error = $\frac{|40|}{240}*100$

Percent error = $\frac{4000}{240}=16.67\%$

Rounding off to nearest whole percent

Percent error = 17%

There is 17% error in the guess.

Keywords: percentage, division

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