If the second die always shows an odd no. find the conditional probability of getting a sum as 7, if a pair of dice is to be known.

Hello student,
Please find the answer to your question below
As second die always shows odd number 1,3,5 are possible
so number of possible ways=6*3=18 ways
also given sum should be 7 so possible ways are
(1,6) ,(3,4) ,(5,2) so there are 3 ways
So the conditional probability of getting a sum as 7,if a pair of dice is to be thrown
is 3/18=1/6