A five digit number is formed by using digits 1 2 3 4 and 5 without repetition What is the probabili...........

Quantitative Aptitude ( CCS) Probability

A five-digit number is formed by using digits 1, 2, 3, 4 and 5 without repetition. What is the probability that the number is divisible by 4?

1/5

5/6

4/5

None of these

A number divisible by 4 formed using the digits 1, 2, 3, 4 and 5 has to have the last two digits 12 or 24 or 32 or 52.

In each of these cases, the five digits number can be formed using the remaining 3 digits in 3!=6 ways.

A number divisible by 4 can be formed in 6×4=24 ways.

Total number that can be formed using the digits 1, 2, 3, 4 and 5 without repetition

=5!=120

Required probability = 24/120 =1/5

Submit Error