Forming Divisible Numbers

Seven digits from the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 are written in random order. Find the probability that this seven-digit number is divisible by 9.

If the answer is in the form \(\frac{a}{b}\) for coprime positive integers, submit as \(a + b\).

To try more such problems click here.
×

Problem Loading...

Note Loading...

Set Loading...