Leah is new to typing. She types several sentences in five minutes. When she checks the sentences, she finds that she’s made a total of fifteen errors. What is Leah’s error rate?

Question

NAGC · Answer

5:15 is the ratio

adreannazetella12 · Answer

A. 
5 errors per minute
B. 
3 errors per minute
C. 
15 errors per minute
D. 
10 errors per minute

NAGC · Answer

what do you think it is.

adreannazetella12 · Answer

B? 3*5=15 , but i am not 100 percent sure

NAGC · Answer

your right because 3 times 5 equals 15 so 3 errors for each minute good job!

dude · Answer

The answer is right, the reasoning isn't

Basically you're trying to find the error rate per minute (find the unit rate)

$\large \frac{total~\#~of~errors}{\#~of~minutes}$

NAGC · Answer

this is how was taught