11 The number of T shirts a school store sells monthly has the following probability distribution of T shirts X 0 1 2 3 4 5 6 7 8 9 10 P X 0 02 0 15 0 18 0 21 0 14 0 08 0 08 0 04 0 03 0 02 0 05 If each T shirt sells for 10 but costs the store 4 to purchase what is the expected monthly T shirt profit A 3 78 B 15 12 C 22 68 D 30 00 E 37 80