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Multiplication Rule

At least numb...

Question

At least number of times a fair coin must be tossed so that the probability of getting at least one head is at least 0.8, is

A

7

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B

6

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C

5

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D

None of these

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Solution

The correct option is D
None of these

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Q. The least number of times a fair coin must be tossed so that the probability of getting at least one head is at least 0.8, is
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