Find The Probability That Tail Appears an Odd Number of Times

A coin is tossed 5 times. The probability that tail appears an odd number of times, is

  1. 1/2
  2. 1/3
  3. 2/5
  4. 1/5
Anurag Mishra Professor Asked on 4th October 2015 in Maths.
Add Comment
  • 1 Answer(s)

    Answer: (1) 1/2

    Explanation:-
    A coin tossed = 5 times
    Then, the total number of cases =  25 = 2 x 2 x 2 x 2 x 2
    = 32
    The number of favourable cases = 5C1 + 5C3 + 5C5
    = 5 + 10 + 1
    = 16

    Therefore, the probability of tail appears = 16/32
    = 1/2

    Then, the probability that tail appears an odd number of times, is 1/2.

    Hence, the answer is (1) 1/2.

    Anurag Mishra Professor Answered on 4th October 2015.
    Add Comment
  • Your Answer

    By posting your answer, you agree to the privacy policy and terms of service.