Lets take an example, Below are three instances of table with ratio of tuples equal to the original relation.
A |
B |
C |
Y |
Y |
L |
P |
Q |
M |
C |
D |
N |
X |
Z |
O |
C |
D |
E |
L |
Z |
A |
M |
Z |
A |
N |
Z |
A |
L |
Z |
B |
M |
Z |
B |
O |
Z |
B |
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.
A |
B |
C |
D |
E |
F |
Y |
Y |
L |
Z |
A |
Z |
Y |
Y |
L |
Z |
B |
Z |
P |
Q |
M |
Z |
A |
Z |
P |
Q |
M |
Z |
B |
Z |
C |
D |
N |
Z |
A |
Z |
X |
Z |
O |
Z |
B |
Z |