# This is tough may be not for u

**Discrete Mathematics**Level 4

Number are selected at random, one at a time,from the two-digit number \(00,01,02,03,...99\) with replacement.An event \(E\) occurs if and only if the product of the two digits of selected number is \(18\).If four numbers are selected, the probability that the event \(E\) occurs **at least \(3\) times**,is \(\frac{k}{(25)^{4}}\),find the value of \(k\)