Answer:
yes.
Step-by-step explanation:
Because if you buy a re-usable water bottle you wont have to keep buying more water bottles
Since there are two black queens out of 52 cards, there is a 2/52 chance of drawing a black queen first. This is equivalent to a 1/26 chance.
Now that we have removed a black queen, there are 51 cards left in the deck. 26 of them are red because we only took away a black card. This means that there is a 26/51 of drawing a red card next.
In order to find the probability of both of these happening, we multiply the two together. 1/26 * 26/51 = 26/1326. This reduces to 1/51. So, there is a 1/51 chance of drawing a black queen, then a red card.
The answer is -2.5. this is how you work it out.
21.4 + (-23.9) = -5/2 = -2.5
5 gallons would be the right answer
