(i) a red marble?
(ii) a white marble?
(iii) is not a green marble?
The Total number of marbles in the box = 5+8+4 = 17
P(E) = (Number of favourable outcomes/ Total number of outcomes)
(i) Total number of red marbles in the box = 5
P (red marble) = 5/17 = 0.29
(ii) Total number of white marbles in the box = 8
P (white marble) = 8/17 = 0.47
(iii) Total number of green marbles in the box = 4
P (green marble) = 4/17 = 0.23
∴ P (not a green marble) = 1-P(green marble) = 1-(4/7) = 0.77