50% half of 80 is 40 you
20% (or 2 in 10 chance)
1
35
3 in 10
Two.
Use this formula - 100 * red / (blue+red+yellow).
at least 39 blue marbles
8:6
0No blue marbles in the bag.
20% (or 2 in 10 chance)
You would be more likely to pull out a white marble as there are no red marbles in the bag.
It is 2/10.
1
35
There could be 12 white marbles and 16 red marbles
The probability is 0.3692
3 in 10