Answer Happy

Please help to solve this probability problem. The numbers on
the line (excluding the question numbers like 1. 2. 3.) are the
final correct answers (for this question, the correct answers are
399.60 and 319.20 and so on). Please give detailed steps to explain
how to get the final correct answer. Thanks!
4. Fill in the blanks A biased coin has a probability of 60% for showing head. What is the expected number of heads obtained when we flip the coin 666 times? Ans: 1. 399.60 (2 decimal places) What is the expected number of changeovers(*) when we flip the coin 666 times? Ans: 2. 319.20 (2 decimal places) What is the expected number of flips needed until we obtain 400 heads? Ans: 3. 666.67 (2 decimal places) What is the expected number of flips needed until we obtain 100 tails? Ans: 4. 250.00 (2 decimal places) (*) A changeover occurs whenever an outcome differs from the one preceding it. For instance, if HHTHT is the outcome of 5 coin flips, there are 3 changeovers.