Question: Please give me an answer and very easy explanation . I cannot understand this at al. It seems to be very hard for me p.a

Please give me an answer and very easy explanation . I cannot understand this at al. It seems to be very hard for me p.a I'm bad at Maths, so please be kind to explain as easy as possible! ???

Using the formulas below, how many different groups of 3 students could I create from a class of 7 students? n PK n! (n-k ) ! n Ck n! k! (n-k )

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