statistics
posted by Sharon .
Suppose a box of marbles contains an equal number of red marbles and yellow marbles but twice as amny green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilitites to the elements.

Based on your statement, 25% are red, 25% are yellow, 50% are green. take it from there

Events A, B, C are define as sample space S. Their corresponding sets of sample points do not intersect, and their union is S. Furthermore, event b is twice as likely to occur as event A, and event C is twice as likely to occur as event B. Determine the probability of each of the three events.