Q21 of 249 Page 31

Mark the correct alternative in each of the following:

If A and B are two events, then


geogebra-export.png


In the give picture we have,


= (1)


A⋂B = (2)


= (3)


Now, according to the addition theorem of probability we get the equation:



More from this chapter

All 249 →
19

Mark the correct alternative in each of the following:

A bag contains 5 brown and 4 white socks. A man pulls out two socks. The probability that these are of the same colour is


 20

Mark the correct alternative in each of the following:

If S is the sample space and and S = A∪B, where A and B are two mutually exclusive events, then P(A) =


 22

Mark the correct alternative in each of the following:

If P (A ∪ B) = 0.8 and P (A ∩ B) = 0.3, then


23

Mark the correct alternative in each of the following:

A bag X contains 2 white and 3 black balls and another bag Y contains 4 white and 2 black balls. One bag is selected at random and a ball is drawn from it. Then, the probability chosen to be white is