If Raju rolls the given Die thrice, then what will be the probability of getting the sum, a prime number?
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108
5
Total number of cases =6
3
=216
The sum of 15 is obtained by three dice in following ways :
(i) (3,6,6)=3 ways
(ii) (4,5,6)=6 ways
(iii) (5,5,5)=1 way
Therefore, favourable number of ways =10
Thus required probability is
216
10
=
108
5
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