A bag contains three green marbles, four blue marbles and two orange marbles. If a marble is picked at random than the probability that it is not and orange marble is
Pr(not orange)=pr(blue or green)=7/9
To find the probability that a randomly picked marble is not orange, we need to calculate the number of non-orange marbles and divide it by the total number of marbles in the bag.
The bag contains three green marbles, four blue marbles, and two orange marbles, so the total number of marbles in the bag is 3 + 4 + 2 = 9.
The number of non-orange marbles is the sum of the green marbles and the blue marbles, which is 3 + 4 = 7.
Therefore, the probability that a randomly picked marble is not orange is 7/9.