Find the mean, median and mode of the data set. 12, 18, 14, 13, 12, 13, 6, 15, 5

Mean = 12

Median = 13

Mode = 12 & 13 (Bi-modal)

Step-by-step explanation:

Arranging the given data set in ascending order, we get;

 5, 6, 12, 12, 13, 13, 14, 15, 18

                                     = = = 12

        Firstly we will check the no. of observations in our data set, i.e. n = 9

        since, n is odd so median is given by;

        Median = = 5th obs = 13  

       so, we can say that our data set is Bi-modal as it has two mode 12 & 13 .

answer: c is correct, a regular pentagon