Two numbers and are chosen from the set . Find the probability that is divisible by .

Printable View

- September 27th 2008, 06:38 PMpankajClassical definition of probability
Two numbers and are chosen from the set . Find the probability that is divisible by .

- September 28th 2008, 03:07 AMMoo
Hello,

Note that with has a remainder 1 in the division by 5.

Therefore, none of these numbers would be such that is divisible by 5.

Remain the multiples of 5. There are n of them in the set. How many ways are there to choose 2 objects randomly among n ? (with replacement)