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How many such pairs of digits are there ...

How many such pairs of digits are there in the number 531268947 each of which has an many digits between them in the number as when they are arranged in descending order ?
1) None
2) One
3) Two
4) Three
5) More than three

A

None

B

One

C

Two

D

More than three

Text Solution

Verified by Experts

The correct Answer is:
D
Given number: `"5 3 1 2 6 8 9 4 7 "`
Arranging the digits digits
in descending order : `"9 8 7 6 5 4 3 2 1"`

Therefore, such pairs = Six.
i.e. (5,2), (3, 6), (1, 2), (1,7), (2,7) and (8,9) 31. (c)
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