Question 47

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Jambmaths question: 

How many three – digit number can be formed from 32564 without any digit being repeated?

Option A: 

120

Option B: 

10

Option C: 

20

Option D: 

60

Jamb Maths Solution: 

32564 is a 5 – digit number, the number of  3 – digits numbers that can be formed are

$^{5}{{P}_{3}}=\frac{5!}{(5-3)!}=\frac{5!}{2!}=\frac{5\times 4\times 3\times 2!}{2!}=60$

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