What is the probability that both socks are white?
The probability of picking a pair of white socks is also 1/2 of 11/23, meaning in order to get the probability of picking any matching pair, you add these two together. The final probability of picking a matching pair of socks is 11/23, or 47.8 percent.
What is the smallest number of socks you must take out of the drawer?
What is the smallest number of socks you must take out of the drawer in order to be certain that you have a pair that match? Solution: Three socks.
How many red socks are in a drawer?
There are 7 socks in a drawer, 3 black ones and 4 red ones. If 4 socks are drawn, what is the probability that 2 of them are red? There are 7 socks out of which 3 are black and 4 red socks. Now, 4 socks are drawn at random out of which we want 2 red socks, thus the remaining 2 socks must be of black color.
How to draw 3 black socks and 2 white socks?
A draw contains 3 black socks and 2 white socks. A sock isdrawn at random and then A draw contains 3 black socks and 2 white socks. A sock isdrawn at random and then replaced. Find each probability. p (2 black) p (black, then white) p (white, then black) p (2white)
How many ways are there to pick red socks?
There are ( 4 2) = 6 ways to pick blue socks, ( 7 2) = 21 ways to pick red socks, and ( 3 2) = 3 ways to pick yellow socks. So there are 30 possible “good” outcomes out of 91 total, so the probability is 30 91 ≈ 32.967 %
Are there 7 white socks and 4 black socks?
Originally Answered: There are 7 white socks and 4 black socks in a draw. What is the probability that 2 socks are the same colour if pulled out at random? Originally Answered: There are 7 white socks and 4 black socks in a draw. What is the probability that 2 socks are the same colour if pulled out at random?
There are 7 socks in a drawer, 3 black ones and 4 red ones. If 4 socks are drawn, what is the probability that 2 of them are red? There are 7 socks out of which 3 are black and 4 red socks. Now, 4 socks are drawn at random out of which we want 2 red socks, thus the remaining 2 socks must be of black color.
A draw contains 3 black socks and 2 white socks. A sock isdrawn at random and then A draw contains 3 black socks and 2 white socks. A sock isdrawn at random and then replaced. Find each probability. p (2 black) p (black, then white) p (white, then black) p (2white)
What happens if you replace all the white socks in a drawer?
We’d still find P [white] = 4/16, but notice that if we do not replace, now we have only 15 socks and 3 of them are white. This is crucial to understand. And so we’d get (4/16) * (10/15) = 1/6. We actually improved our odds since getting rid of the white on the first draw lowered the number of “bad” socks to draw on the second draw.
There are ( 4 2) = 6 ways to pick blue socks, ( 7 2) = 21 ways to pick red socks, and ( 3 2) = 3 ways to pick yellow socks. So there are 30 possible “good” outcomes out of 91 total, so the probability is 30 91 ≈ 32.967 %
