Gina has a bag containing Red, Green, Blue, Yellow, and Brown M&Ms.
If someone picks M&Ms without looking:
The probability of picking a Red M&M from the bag is one half.
The probability of picking a Green M&M is half the probability of picking a red M&M.
Blue, Yellow, and Brown M&M shave an equal probability of being picked
There are 24 Green M&Ms in the bag.
How many M&M's are there altogether?

Q&A Education