How many five digit prime numbers can be obtained by using all the digits 1,2,3,4 and 5 without repetition of digits
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Answered by
1
Answer:
5
Step-by-step explanation:
prime numbers
without reptition digits
Answered by
0
Answer:
ANSWER
Total number that can be formed using the digits 1,2,3,4 and 5 without repetition =5!=120
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. Total number of numbers divisible by 4 can be formed in 6×4=24 ways.
Required probability:
P=
120
24
=
5
1
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