Selecting of Drawing 2 White and 2 Black Socks
How many white socks are in a drawer?
How many white socks are in a drawer?
You can select 2 of the 11 socks in the drawer in 11 x 10 / 2 = 55 ways. You can select 2 of the 7 white socks in 7 x 6 / 2 = 21 ways. You can select 2 of the 4 black socks in 4 x 3 / 2 = 6 ways.
Can you draw 4 socks out of 7 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. Number of ways we can draw 4 socks out of a pack of 7 socks is 7C4 = 7!/ (4!*3!) = 35 ways.
What's the probability of picking a black sock?
Probability of picking a black sock in the first attempt = 6/10. Total Number of Blue socks = 4. Probability of picking a blue sock in the first attempt = 4/10. Hence, the required probability = 7/15. n (F)= Number of Favourable chances, here choosing 2 balls either from Red or a blue socks;
How many pairs of socks are there in the world?
You have 6 black socks and 4 blue socks. If u select two socks at random, find the probability that you select two socks of the same color.? – Quora You have 6 black socks and 4 blue socks. If u select two socks at random, find the probability that you select two socks of the same color.?
How many socks are in a pair of white socks?
Three socks. If the first sock is black, the second one could be black, in which case you have a matching pair. If the second sock is white, the third sock will be either black and match the first sock, or white and match the second sock. Only three. You will either get three of the same color, two black and one white or vice versa.
How many socks are in the sock drawer?
Your sock drawer is a mess and contains 10 white socks, 12 black socks, and 4 red socks. How many socks would you have to pull out of the drawer to be sure you have a pair?
What's the probability that you have two black socks?
In that case you want the probability that you have two black socks or two white socks. If the first sock you draw is black, you want the probability that the second sock is also black. That's 4 7. If the first is white you want the probability that the second sock is also white. That's [math]\\ [/math]
What's the smallest number of socks you need to pick?
You have 12 black socks and 12 white socks mixed up in a drawer. You're up very early and it's too dark to tell them apart. What's the smallest number of socks you need to take out (blindly) to be sure of having a matching pair? Three socks. If the first sock is black, the second one could be black, in which case you have a matching pair.
Selecting of Drawing 2 White and 2 Black Socks
Source: https://firstlawcomic.com/how-many-white-socks-are-in-a-drawer/
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