Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Probability

Question:

A fair die is rolled. Consider events E = {1, 3, 5} and  F = {2, 3} then find P((EIF)-

 

Options:

1/2

1/3

1/4

1/6

Correct Answer:

1/2

Explanation:

When a fair die is rolled, the sample space S will be S= {1, 2, 3, 4, 5, 6}

It is given that E = {1, 3, 5} and  F= {2, 3} 

So, P(E) = 3/6 = 1/2

P(F) = 2/6 = 1/3

also, E∩F= {3}

So P(E∩F) = 1/6

Hence, P(FIF) = P(E∩F) / P(F)

                     = (1/6)/(1/3)

           P(FIF) = 1/2