Answer:
1 Â 3/5*2/3=6/15
2 Â (3/5*2/3)+(2/3*5/6)+(3/5*5/6)=Ans
3 Â same as 2 i think
4 Â 3/5+2/3+5/6=ans
5 (1-3/5)*(1-2/3)*(1-5/6)
Explanation
1 means x and y... for such a  we multiply the probabilities
2 means x and y or x and z or y and z9 multiply ands  add ors
3 i think it is same as 2
4 for this you have to negate the probabilities of killing to find that of not killing. Â Since it will be x and y and z, you multiply the final probabilities
:)