2. 22
6. 12
7. 420x^3
10. 7
14. 1
It has bad behavior you should she the conduct grade
The expected value of the inseam length of the jeans is found as
30% of 30+ 25% of 32+ 10% of 34+ 10% of 36 + 10% of 38 + 15% of 40
= 
= 
Hence, the third option 33.8 is the correct expected value.