The measure of angle 1 is (3x + 10) and the measure of what is the measure of angle 7?
angle 4 is (4x - 15).
2 4
1 3
6/8
5 7

Abag contains 5 red marbles , 6 blue marbles and 4 green marbles. susie selects a marble and returns it to the bag before selecting another marble. if susie selects a red marble 6 out of 20 times, what is the experimental probability that the next marble she selects will be a red marble ?