Mathematics - Functions Question with Solution | TestHub

MathematicsFunctionsTypes of Function (Mapping)Medium2 minQB

MathematicsMediumsingle choice

Passage / Comprehension

Let us consider the two non empty sets X and Y such that X = {1, 2, 3, 4, 5, 6, 7} and

Y = {1, 2, 3, 4, 5, 6}. And answer the following questions.

The number of into function from X to Y is

Answer:

Solution:

Number of into function $= 6^{7} - \frac{7 ! 6 !}{2 ! 5 !}$ $= 6^{7} - 3.7!$

Stream:JEESubject:MathematicsTopic:FunctionsSubtopic:Types of Function (Mapping)

⏱ 2mℹ️ Source: QB

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