Please provide complete work for problem #3 please.

3. In the 2 data sets below find the expected value. Then just promise to think about while the mean is the same why the range of x and variation in the numbers x can take is so different in the 20. P(x) 0.1 2 0.3 0.45 4 0.15 P(y) -1000 0.38675 -100 0.1 100 0.1265 1000 0.38675 4. What is an example of discrete variable and a continuous variable