Ans given: 100
Lets take an example, Below are three instances of table with ratio of tuples equal to the original relation.
If we join tem in any way the resulting table will have 6 tuples
We can thus conclude that P join Q join R will result in 300 tuples.
Ths is wrongly framed question. They havent stated maximum or minimum.
If minumum, then its 0.
If maximum, then 300 tuples
X->YZ , Y->XZ , ...