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Combination of n Different Things Taken One or More at a Time

Let the unit ...

Question

Let the unit digit of any number is $x$ and the digit at $10$ th place is $y$ then the number is

A

x y

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B

x + y

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C

10 x + y

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D

10 y + x

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Solution

The correct option is D $10 y + x$
Given the unit digit of any number is $x$ and the digit at $10$ th place is $y$ then the number is $10 y + x$ .

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