Free Practice 6.RP.A.2 – 9008301

Emily can solve $5$ questions in $6$ minutes while Megan can solve $7$ questions in $24$ minutes. What is the efficiency ratio of Emily to Megan ?
A. $\displaystyle \frac{20}{7}$
B. $\displaystyle \frac{5}{7}$
C. $\displaystyle \frac{7}{20}$
D. $\displaystyle \frac{28}{5}$
E. $\displaystyle \frac{7}{5}$

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