In triangle MNO, the measure of ZM is 1° greater than the measure of ZN and the measure of 20 is 10° less than the measure of ZN. Find the measure of each angle.

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?