Question

last week betty practiced her guitar for 45 minutes on monday, 25 minutes on tuesday, 35 minutes on wednesday, 20 minutes on thursday, and 40 minutes on friday. what was the mean number of minutes that she spent practicing each day?

a. 38 minutes
b. 33 minutes
c. 35 minutes
d. 31 minutes

Explanation:

Step1: Calculate total minutes

$45 + 25+35 + 20+40=165$

Step2: Calculate number of days

There are 5 days from Monday - Friday.

Step3: Calculate the mean

The mean $\bar{x}=\frac{165}{5}=33$

Answer:

B. 33 minutes