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Common Data for Questions 3.25 and 3.26
Consider the following relations A, B and C:
A.
Id
Name
Age
12
Arun
60
15
Shreya
24
99
Rohit
11
B.
Id
Name
Age
15
Shreya
24
25
Hari
40
98
Rohit
20
99
Rohit
11
C.
Id
Phone
Age
10
2200
02
99
2100
01
3.25 How many tuples does the result of the following
relational algebra expression contain? Assume
that the schema of Au Bis the same as that
of A
(AUB) pd 1 c mars
(a) 7
(b) 4
(c) B


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