Subject
Quantitative Aptitude
Topic
Probability
Four dice are thrown simultaneously. Find the probability that two of them show the same face and remaining two show the different faces.
Four dice are thrown simultaneously. Find the probability that two of them show the same face and remaining two show the different faces.
ক)
4/9খ)
5/9গ)
11/18ঘ)
7/9Explanation
Select a number which ocurs on two dice out of six numbers (1, 2, 3, 4, 5, 6). This can be done in ways. Now select two distinct number out of remaining 5 numbers which can be done in ways. Thus these 4 numbers can be arranged in 4!/2! ways. So, the number of ways in which two dice show the same face and the remaining two show different faces is => n(E) = 720 =Related questions
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