Question

How many 4 - digit numbers can be formed from the digits 2, 3, 4, 5, 6 and 7, which are divisible by 5 and none of the digits is repeated? *

Answer 1

Answer:

60

Step-by-step explanation:

for a number to be divisible by 5 is the unit place has to be 0 or 5. in this case it's possible only when the unit place is 5.

now we have total 6 numbers and repetition is not allowed. So, number 5 is fixed in the unit place and now out of 5 numbers which are left thousands place can be filled with 5 number hundreds place can be filled with 4 number and tens place can be filled with 2 numbers. Multiplying will give us answer which is 60. (5*4*3*1)

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