One may get the white ball and the red ball – in whichever order?

There are four identically sized and shaped balls in a box, with only its top open. Each ball is of a different colour, these being: Green, Red, White and Blue, only one ball of each colour. Without looking into the box, one ball is randomly picked out and tis color is noted; then it is returned to the box. What are the chances that, in two successive draws, one may get the white ball and the red ball – in whichever order?
(a) 1/16
(b) 1/8
(c) 1/4
(d) 1/2

Anurag Mishra Professor Asked on 12th January 2016 in Maths.
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    Answer: (b) 1/8 

    Anurag Mishra Professor Answered on 12th January 2016.
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