Question

if one number is chosen at random from the first 1000 positive integers, what is the probility that the number chosen is multiple of both 2 and 7?

Answer 1

0.071

Explanation:

There are floor(1000/(2·7)) = 71 integers in the range 1..1000 that are multiples of both 2 and 7. The probability of randomly selecting one of them is ...

71/1000 = 0.071