Solve. Write a mixed numeral for the answer.
-A test of five light bulbs showed that they burned for the following lengths of time (in days): $17 \frac{2}{3}$, $19 \frac{1}{4}, 20 \frac{1}{2}, 21$, and $18 \frac{3}{4}$. For how many days, on average did the light bulbs burns?
A) $19 \frac{13}{30}$ days
B) $19 \frac{1}{6}$ days
C) $19 \frac{7}{12}$ days
D) $19 \frac{17}{30}$ days

Question

Quizplus · Accepted Answer

To find the average, sum the mixed numbers: $17 \frac{2}{3} + 19 \frac{1}{4} + 20 \frac{1}{2} + 21 + 18 \frac{3}{4} = 96 \frac{13}{12}$. Convert $ \frac{13}{12} $ to $1 \frac{1}{12}$, so the total is $97 \frac{1}{12}$. Divide by 5: $97 \div 5 = 19$ and $\frac{1}{12} \div 5 = \frac{1}{60}$. Convert $\frac{1}{60}$ to a common denominator with 30, resulting in $\frac{13}{30}$. Thus, the average is $19 \frac{13}{30}$.

Solve Write a Mixed Numeral for the Answer 172317 \frac{2}{3}1732​ 1914,2012,2119 \frac{1}{4}, 20 \frac{1}{2}, 211941​,2021​,21

Solve Write a Mixed Numeral for the Answer $17 \frac{2}{3}$ $19 \frac{1}{4}, 20 \frac{1}{2}, 21$