<PRE><B>Question 393749</B>
John and Anita can solve 90% and 70% respectively of statistics problems. If they 
try a statistics problem independently, what is the probability that: 
(a) both of them solve the problem,:::0.9*0.7
----------------------- 
(b) only John solves the problem,:::0.9*0.3
----------------------- 
(c) only Anita solves the problem,:::0.1*0.7
----------------------------- 
(d) neither of them solve the problem,:::0.1*0.3
------------------------------ 
(e) the problem is solved (or at least one of them solve the problem)
1-0.1*0.3
====================
cheers,
Stan H.
==========</PRE>