EPFO 2015 English Medium Solved Paper

Question : 85 of 120

Marks: +1, -0

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 its colour is noted; then it is returned to the box. What are the chances that, it two successive draws, one may get the white ball and the red ball- in whichever order?

$1/16$
$1/8$
$1/4$
$1/2$

Validate

Solution:

Required probability

={n(E)}/{n(S)}

=2/16

=1/8

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