Answer:
3/7 chance of picking a red marble.
Step-by-step explanation:
You know that there are 4 non-red marbles and 3 red marbles. You know this because of the statement "he odds against picking a red marble from a bag are 4:3.".
Now you must both amounts of marbles to find the total.
3+4=7
now,
we know that we are looking for the odds of picking a red marble.
So, 3 red marbles in a bad of 7 marbles.
Our odds are 3/7!
