10 waiters work at a small restaurant including 4 who work full time ...

  

10 waiters work at a small restaurant including 4 who work full time and 6 who work part time. The amount of wages in salary and tips for the full time waiters average $700 per week while the part time waiters make an average of $200 per week. Two of these waiters are selected at random. What is the expected value of their total wages per week?

A) $450
B) $800
C) $900
D) $400