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UP TGT Mathematics Set Theory Test Series - Part 4

Find the number of injective (one-one) functions from a set with 3 elements to a set with 7 elements.

Type: MCQ • Marks: 1
Find the number of injective (one-one) functions from a set with 3 elements to a set with 7 elements.
Options
A. 210
B. 420
C. 315
D. 105
Explanation
Number of injective functions=P(7,3)=210.
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