TS ICET 23 May 2018 Shift 2 Paper

Question : 147 of 200

Marks: +1, -0

A bag contains 3 white, 2 black and 4 red balls. Three balls are drawn in succession without replacement. The probability that of the three balls drawn one is white, one is black and one is red. is

$1/21$
$1/25$
$1/28$
$1/32$
No answer

Validate

Solution:

Required Probability

=3!× \;{3 × 2 × 4}/{9 × 8 × 7}=\;{6}/{21}=\;{2}/{7}

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