[giddy]

Originally Posted by sleepy_sentinel

Zorillo wrote:

'For example, what is the probability that a number amongst the first 1000 positive integers is divisible by 8? Don’t start counting the multiples of 8! The figure of 1000 is a red herring. Use a little common sense. The numbers will be 8,16,24,32…So, 1 in every 8 numbers is a multiple of 8, even if you consider the first million integers. So Probability is 1/8 (Question from Power-Prep.)'

Hi Zorrillo, I hate to nit-pick, but that approach only works because 1000 is divisible by 8.If the number mentioned was 999 or 1001, the probability would NOT have been 1/8.In my experience, its always better to do probability problems ab initio.
Great post otherwise.Do keep up the good work.

Cheers

How would you go about in solving the probability problem if the number is 999 or 1001? Thanks.