Find the mean, median and mode of the marbles distribution.

Ethel has 15 marbles, Elmer has 8 marbles, Nancy has 10 marbles, Gladys has 12 marbles, Cyrus has 10 marbles, Augustus had 20 marbles, and Hermione has 30 marbles. For the mean and the median, show at least one intermediate step in the procedure.

a) Mean ________________________________________________

b) Median_______________________________________________

c) Mode ________________________________________________ Two more kids join the group, Parnell with 6 marbles and Lewis with 80.

d) Does that change the mean, the median, or both?