1.

How Many 3-digit Numbers Can Be Formed From The Digits 2,3,5,6,7 And 9 Which Are Divisible By 5 And None Of The Digit Is Repeated.?

Answer»

As the NUMBER is divisible by 5, the unit digit of 3-digit number MUST be 5.

Rest TWO digits can be selected in 5c1 * 4c1 = 20 ways.

As the number is divisible by 5, the unit digit of 3-digit number must be 5.

Rest two digits can be selected in 5c1 * 4c1 = 20 ways.



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