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An unbiased coin is tossed n times. If t...

An unbiased coin is tossed n times. If the probability of getting atleast one head is greater than 0.8, then the least value of n is

A

2

B

3

C

4

D

5

Text Solution

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The correct Answer is:
B
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SIA PUBLICATION-MEASURES OF DISPERSION AND PROBABILITY -PROBLEMS
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