ProbabilityHard
Question
A 9 digit number using the digits 1, 2, 3, 4, 5, 6, 7, 8 & 9 is written randomly without repetetion. The probability that the number will be divisible by 9 is:
Options
A.1/9
B.1/2
C.1
D.9!/99
Solution
Since sum of 1 + 12 + 3 +......9 = 
= 45 is disisible by 9, hance all no. will be divisible by 9.
= 45 is disisible by 9, hance all no. will be divisible by 9.Create a free account to view solution
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