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Question
Mathematics
Number of ways in which 38808 can be expressed as a product of two co-prime factors is
Q. Number of ways in which
38808
can be expressed as a product of two co-prime factors is
2123
228
Permutations and Combinations
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A
11
B
8
C
16
D
2
Solution:
38808
=
2
3
×
3
2
×
7
2
×
1
1
1
number of co-prime factors
=
2
α
−
1
where
α
is number of different Prime factor, here
α
=
4
So, number of co-prime factors
=
2
4
−
1
=
8