Given a coin which gives HEADS with probability 1/4 and TAILS with 3/4. The coin is tossed k times. What is the probability that we get at least k/2 HEADS is less than or equal to?
(A)
(1/2) k/5
(B)
(1/2) k/2
(C)
(1/3) k/2
(D)
(1/5) k/2
Source: http://www.cse.iitk.ac.in/users/sbaswana/CS648/Lecture-2-CS648.pptx
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