A bag contains 15 red 27 white and 8 green marble. A boy takes one marble out of the bag at random find the probability that marble is not red.
There are a total of 15 + 27 + 8 = 50 marbles in the bag.
The probability of selecting a red marble at random is 15/50 = 3/10.
Therefore, the probability of selecting a marble that is not red is:
1 - 3/10 = 7/10
So the answer is 7/10 or 0.7, which is the probability that the marble is not red.