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Mathematics
Mathematics
Problem
Let
A
A
A
be of order
2
×
5
2 \times 5
2
×
5
and
B
B
B
of order
5
×
3
5 \times 3
5
×
3
. How many elements are there in the product
A
B
AB
A
B
? a)
15
15
15
b)
6
6
6
c)
25
25
25
d)
10
10
10
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