請教個比較簡單的probably問題

老板問，
if a mutation is present at a frequency of 0.001 (1 in 1000) in a population, and I draw 1000 subjects at random from that population, what is the probability that I will see the mutation (in any subject) in the selected 1000 subjects?

what if I pick 2000 subjects at random?

謝謝...

所有跟帖： 

• 不出現的probability是 （1-0.1%)^n -haha2000- ♂ (0 bytes) () 01/23/2009 postreply 06:17:45

• 謝謝，謝謝。後來我也想到了。可是 -家有香豬- ♀ (56 bytes) () 01/23/2009 postreply 06:36:46

• 怎麽做容易就怎麽做唄。 -貧論元- ♂ (62 bytes) () 01/23/2009 postreply 08:25:04

• 問你呢，haha -康MM- ♀ (0 bytes) () 01/24/2009 postreply 14:31:03

• 新年快樂 -haha2000- ♂ (42 bytes) () 01/24/2009 postreply 17:04:42