Confirm this MCQ of MTH-202

[mc100405017 Usama Luqman]

Dear All,

  Today in my MTH-202 paper, I was asked this mcq

If a die is thrown then the probability that the dots on the top are prime numbers or odd numbers is

 1

 1/3

2/3

I think the three of the options are wrong. The correct answer is  1/2

Please confirm me if I am right so that I can email to the teacher to complain that the question was wrong.

Thanks and Regards

Usama Luqman

[bc100402458 Anila Ghaffar]

If a die is thrown then the probability that the dots on the top are

prime numbers or odd numbers is?

odd numbers are {1,3,5}
Total is {1,2,3,4,5,6}

3/6 = 1/2 = Answer....

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[mc100405017 Usama Luqman]

Thanks

[mc090403580 Muhammad Fahim]

S = {1,2,34,5,6}

let

    A : odd numbers

    B : Prime numbers

    A = {1, 3, 5}

    B = {2, 3, 5}

A intersection B = {3, 5}

P(A) = 3/6

P(B) = 3/6

P(A Intersection B) = 2/6

P(Odd or Prime} = P(AUB)

                         = P(A) + P(B) - P(A intersection B)
                         = 3/6 + 3/6 - 2/6

                         = 4/6