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let S ={1,2,3,…,24}. Define a relation '...

let `S ={1,2,3,…,24}.` Define a relation `'~'` on S as `x ~y` is the product of the digits in x is same as that of the digits of y. (Note that is x is a single digit number then the product of the digits in x will be considered to be x.) Then the number of equivalence classes for this equivlence relation is

A

9

B

10

C

20

D

24

Text Solution

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The correct Answer is:
B
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