Answer:
the answer's 11
2,5 b 1 c 0,5 d -1 e 2,5
Step-by-step explanation:
3/8
The possible outcomes
TTT TTH THT THH HHH HHT HTH HTT = 8 outcomes
There are TTH THT HTT 3 with exactly two tails
P ( exactly 2 tails) = 3/8