If 1!9 = 20, 9!5 = 28 and 5!5 = 20, then ﬁnd the value of 7!3 = ? – McqOptions

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1.	If 1!9 = 20, 9!5 = 28 and 5!5 = 20, then ﬁnd the value of 7!3 = ?
A.	20
B.	15
C.	22
D.	24
Answer» B. 15

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