As per given by the question,
There are given that, 9 red marble, 7 blue marbles, and 4 yellow marbles contain in bag.
Now,
From the given bag;
Total number of marble contains in bag is,
9+7+4=20.
Then,
The probability that chosen yellow marble,

So,'
There are yellow marbles is 4 and total number of marbles is 20 in a bag.
Then, the probability is;

Now,
The probability that it is not yellow;
So,

The probability that it is not a yellow marble is,

Hence, the option D is correct, that means
