A bag has ten marbles in it. Three of them are green one of them is red four of them are yellow and two of them are blue. If one marble is taken out of the bag randomly what is the probability that it will neither be green nor yellow?
A 0.40
B 0.30
C 0.30 or 0.40
D 0.70

Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. the drive is currently serving a request at cylinder 2,150, and the previous request was at cylinder 1,805. the queue of pending requests, in fifo order, is: 2069, 1212, 2296, 2800, 544, 1618, 356, 1523, 4965, 3681