Question

The frequency table of the scores in 10 throws of a dice is given below. Find the mean

Scores	Tally marks
1	||
2	|||
3	||||
4	|||

• A. 4.58
• B. 2.67
• C. 3.54
• D. 2.58

Answer 1

The correct option is B 2.67

Scores $x_i$	Tally marks	Frequency $f_i$	$f_i$ $\times$ $x_i$
1	||	2	2
2	|||	3	6
3	||||	4	12
4	|||	3	12
		$\sum f_i$= 12	$\sum f_i{x}_i$ =32

Mean $\overline{x}$ = $\frac{\sum f_i{x}_i}{\sum f_i}$= $\frac{32}{12}$ =2.$\overline{6}$= 2.67