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How many times must a man toss a fair coin, so that the probability of having at least one head is more than 80%?
cbse
class12
modelpaper
2011
sec-b
q22
math
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asked
Dec 29, 2012
by
thanvigandhi_1
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How many times must a man toss a fair coin so that the probability of having at least one head is more than 90%?
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A fair coin is tossed four times and a person win Rs.1 for each head and lose Rs.1.50 for each tail that turns up.From the sample space,calculate how many different amounts of money you can have after four tosses and the probability of having each of these amounts.
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