Four coins are tossed. The probability that at least one head turns up

1.	Four coins are tossed. The probability that at least one head turns up, is [DSSE 1981]
A.	1/16
B.	1/4
C.	15/16
D.	None of these
Answer» D. None of these

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Four coins are tossed. The probability that at least one head turns up, is [DSSE 1981]

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