A coin is tossed n times. The probability of getting head at least once is greater than 0.8, then the least value of n is [EAMCET 2003]

A coin is tossed n times. The probability of getting head at least onc

1.	A coin is tossed n times. The probability of getting head at least once is greater than 0.8, then the least value of n is [EAMCET 2003]
A.	2
B.	3
C.	4
D.	5
Answer» C. 4

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A coin is tossed n times. The probability of getting head at least once is greater than 0.8, then the least value of n is [EAMCET 2003]

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