Case 1 : B's Avg = 24.5 , 23.2
A's Avg = 19 1/3 , 22.25
Case 2 : B's Avg = 23.833 , 23.99
A's Avg = 20.66 , 21.24
As you've been told repeatedly,
you don't need cases. And specific numbers don't help in determining what
always happens. (Where did those numbers come from, anyway?)
Why in the world are you not learning anything from us? Why should we bother answering you when you don't pay attention? If there's something we say that you don't understand, then ask us specifically about that, rather than going back to what you were doing.
B's avg decreases always .
That's true. Do you understand why?
But what can be said about A's avg?
You tell me! It's the very same kind of thinking. If you understand the reasoning behind the first statement, you should know what to say here.
On the other hand, do you really need to answer this for the problem? You have the solution already.
I'll add the point I mentioned at the end of #42, which may possibly be why you ask this:
If answer (b) is true, then answer (d) is also, though less precise.
Do you understand that? Knowing, for example, that all people breathe, I can correctly say that if you are standing, you are breathing. (You are also breathing if you are
not standing, but I didn't happen to mention that.) Logically, the statement "if A then B" is true as long as B is true whenever A is true, regardless of what happens when A is false.
So the problem doesn't appear to have been written by a logician, or a mathematician generally.
