The number of constant functions possible from $R$ to $B = {2, 4, 6, 8, . . . .24}$ is

24

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12

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8

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6

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Solution

The correct option is B $12$
For constant function from $R$ to $B$
$x$ should be related with only one element in $B$
Thus the number of constant functions that are possible from ${2, 4, 6, 8, . . . .24}$ is $12$

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