Data Set 3-1 - CD a Student Was Interested in the Structure

Multiple Choice

Data Set 3-1 - CD A student was interested in the structure of the families in the U.S. He sampled 29 of his 330 classmates asking the question, "How many children are there in your family?" He compiled the answers into a simple frequency distribution:
$$\begin{array} { l r } X & f \\\hline 7 & 1 \\5 & 2 \\4 & 3 \\3 & 6 \\2 & 10 \\1 & 7\end{array}$$
-Refer to Data Set 3-1. The mean is

A) 3.67
B) 2.25
C) 2.35
D) none of the other alternatives are correct.