The odds against ram solving the problem are 5 to 3 and the odds in favour of krishna solving the same are 7 to 5. What is the chance that it will be solved when they both try?	Choices.
A) 1/4	B) 5/21	C) 16/21	D) 23/28	E) 71/96
Odds against Ram are 5:3 so probability that he will solve the problem is 3/8.   Odds in favor of Krishna are 7:5 so probability that he will solve it is 7/12   It will be solved means that either Ram or Krishna or both will be able to solve it.   P(A or B) = P(A) + P(B) - P(A and B) = 3/8 + 7/12 - (3/8)*(7/12) = 71/96   71/96
<result>E</result>
The odds against ram solving the problem are 5 to 3 and the odds in favour of krishna solving the same are 7 to 5. What is the chance that it will be solved when they both try?