The probability that Shean and Nida pass an examination are 3/4 and 3/5 respectively. Find the probability of both boys failing the examination.

Question

anonymous · Answer

let probability of Shean pass is p(s)=3/4
similarly Nida pass is p(n)=3/5
then for fail means
nothing but negation/inverse of pass 
that is
1-p(s)
and 
1-p(n)

anonymous · Answer

The probability that shean fails is 1/4 and the probability that Nida fails is 2/5 because they only tell you the probability that they pass.

now $$P(AandB)$$ is$$P(A)*P(B)$$

anonymous · Answer

@chetan552, @mihirb. Logical solutions, but got confused to when I saw the listed options.

anonymous · Answer

at last have you clarified or not...??
if not tell me the options..

anonymous · Answer

1/3,3/10,9/20,1/3

anonymous · Answer

then i am sorry...
i think answer must be 1/10...

anonymous · Answer

Thank you guys. Wanted to be sure I wasn't wrong.