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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