Question 1191469
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If a fair coin is chosen and flipped 180 times, the expected number of heads will be 180(1/2) = 90.<br>
If a weighted coin is chosen and flipped 180 times, the expected number of heads will be 180(8/9) = 160.<br>
The probability that a fair coin is selected is 2/5; the probability that a weighted coin is selected is 3/5.<br>
The expected number of heads in the described experiment is then<br>
(2/5)(90)+(3/5)(160) = 36+96 = 132<br>
ANSWER: 132<br>