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Aptitude | Probability | Question 1

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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
 



Answer: (A)

Explanation:

Source: http://www.cse.iitk.ac.in/users/sbaswana/CS648/Lecture-2-CS648.pptx
 



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Last Updated : 28 Jun, 2021
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