ifonenumberischosenatrandomfromthefirst1000positiveintegers,whatistheprobabilitythtthenumberchosenismultipleofboth2and(A)1/125(b)1/8(c)1/2(d)9/16(e)5/8

Question

if one number is chosen at random from the first 1000positive integers ,what is the probability tht the number chosen is multiple of both 2and
(A)1/125 (b)1/8(c)1/2(d)9/16(e)5/8

Answer 1

A
题目大意是：在1000以内随意抽取一个数同时为2和8的倍数的概率是多少?
8是2的倍数,所以只需考虑8,即1000除以8为125