Q19 of 249 Page 31

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


2 brown socks from 5 can be chosen in ways, similarly 2 white socks can be selected in 4 ways.

P(same colour)




More from this chapter

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17

Mark the correct alternative in each of the following:

A box contains 10 good articles and 6 with defects. One item is drawn at random. The probability that it is either good or has a defect is


 18

Mark the correct alternative in each of the following:

A box contains 6 nails and 10 nuts. Half of the nails and half of the nuts are rusted. If one item is chosen at random, the probability that it is rusted or is a nail 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) =


 21

Mark the correct alternative in each of the following:

If A and B are two events, then