Q1. Find the mean, the median and the mode of the given data set. (Round your answers to four decimal places. If there is more than one mode, enter your answers as a comma-separated list.

( If an answer does not exist, enter DNE. )

^ ^ ( that's for me to enter on my homework after I get help from you whether it is DNE or not )

S = {40, 40, 60, 70, 75, 75, 90}

mean =

median =

mode =

Q2. If the random variable X denotes the real valued outcomes given in the following table with the given frequency of occurrence of each of the outcomes, fill in the last line of the table and find the expected value of X.

Outcome	-2	-1	0	1	2
Frequency	30	27	30	28	26
P(X)

E(X) = ?