Air draft

The numbers 1,2,3,4,5 are written on five tickets on the table. Air draft randomly shuffled the tickets and composed a 5-digit number from them. What is the probability that he passed:
and, the largest possible number
b, the smallest possible number
c, a number divisible by five
d, even number
e, odd number
f, a number divisible by three
g, a number divisible by nine

Correct answer:

a =  0.0083
b =  0.0083
c =  0.2
d =  0.4
e =  0.6
f =  1
g =  0

Step-by-step explanation:

a=15!=1120=0.0083
b=a=0.0083=0.0083
c=4 3 2 1 15!=15=0.2
d=4 3 2 1 25!=25=0.4
e=4 3 2 1 35!=35=0.6
c=1+2+3+4+5=15 c2=1+5=6 f=5!5!=1
g1=c/3=15/3=5  g=0=0



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