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How many times must a man toss a fair com so that the probability of having at least one head is more than 90%?
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An urn contains nine balls of which three are red, four are blue and two are green. Three balls are drawn at random without replacement from the urn. The probability that the three balls have different colour isQuestion 2
Suppose a girl throws a die. If she gets a 5 or 6, she tosses a coin 3 times and notes the number of heads. If she gets 1,2,3 or 4 she tosses a coin once and notes whether a head or tail is obtained. If she obtained exactly one head, what is the probability that she threw 1,2,3, or 4 with the die?Question 3
A problem in mathematics is given to three students
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b.
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d. Question Text | How many times must a man toss a fair com so that the probability of having at least one head is more than 90%? |