Question 1177099
<br>
The response from the other tutor starts out with the stated requirement that the total number of melons and avocados is at least 20; then she ends up giving 3 possibilities for the answer, in all of which the total number of fruits is AT MOST 20.<br>
So somewhere in her solution she got mixed up....<br>
However, the problem is absurd, and it doesn't matter whether the total number of fruits is less than 20 or greater than 20; it is easy to see that for either case the number of possibilities is large.<br>
So the problem as stated is severely faulty.<br>
For total number of fruits at least 20 (as the problem states)....<br>
Suppose there are 20 melons. The number of avocados can be no more than three times the number of melons; that means the number of avocados can be any number from 0 to 60, because each of those numbers is "no more than thrice" the number of melons.  And of course for any of those possible numbers of avocados the total number of fruits is at least 20.<br>
And of course if the number of melons is greater than 20, then the number of avocados can be anything from 0 to 3 times the number of melons.<br>
So it is obvious that the problem makes no sense (there are an infinite number of solutions) if the total number of fruits is "at least 20".<br>
Now suppose the problem was supposed to say the total number of fruits is AT MOST 20.<br>
Again it is possible that there are 20 melons, because that would mean the number of avocados would have to be 0; and 0 is less than 3 times 20.<br>
And we could have, say, 10 melons; then, to keep the total number of fruits at most 20, the number of avocados could be anything from 0 to 10, and each of those numbers is no more than three times the number of melons.<br>
In this case, because the total number of fruits has to be at most 20, the number of solutions is again large, but not infinite.<br>
So this is another example of the author of the problem trying to be "different" in how he presents the problem, but ends up with a problem that is nonsense.<br>