If an integer n is to be selected at random from 1 to 100, inclusive, what is probability n(n+1) will be divisible by 8? Choose the correct choice from the following
A) 1/4  B) 1/3  C) 1/2  D) 2/3  E) 3/4
because n(n+1) is always an even product of even*odd or odd*even factors,   there is a probability of 1 that that it will be divisible by 2,   and, thus, a probability of 1/2 that it will be divisible by 4   and, thus, a probability of 1/4 that it will be divisible by 8   1*1/4=1/4   1/4nswer : 1/4
<result>A</result>
If an integer n is to be selected at random from 1 to 100, inclusive, what is probability n(n+1) will be divisible by 8?