Three numbers are drawn from the set 
with replacement. The probability that their sum is 
, is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Given numbers 
Total number of ways of selecting three numbers with replacement 
.
Now, calculate the number of favourable cases.
Let 
, where 
,
and 
.
Clearly, favourable number of cases in the number of solution of above equation.
Coefficient of 
in 
Coefficient of 
in 
Coefficient of 
in 
Coefficient of 
in 
Coefficient of 
in 
Coefficient of 
in 
Coefficient of 
in 
Required probability 
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