Published by:
CGP EDU Academic Team
Published on: August 13, 2026
In a bag there are three tickets numbered 1, 2, 3. A ticket is drawn at random and put back and this is done four times. The probability that the sum of the numbers is even, is
A
B
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
A
The total number of ways of selecting 4 tickets 
.
The favourable number of ways
= sum of coefficients of 
in 
= sum of coefficients of 
in 
Let 
Then 
, (On putting 
and 
, (On putting 
Thus sum of the coefficients of 
Hence the required probaility 
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