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17.09.2019 •
Mathematics
In sal’s sock drawer, there are 2 red, 2 blue, 2 yellow, 2 black, and 2 green socks. if he randomly picks one sock from the drawer, and then another, which fractions should sal multiply to find the probability of choosing a pair of green socks?
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Ответ:
its C
Step-by-step explanation:
(2/10) (1/9)
For edg 2020
Ответ:
Its C
Step-by-step explanation:
I just did it
Ответ:
1. 792 2. 20. 3. 126. 4.1995840
Step-by-step explanation:
Use the formula C(n,r)= n!/ r/ (n-r)! where n is total quantity of varieties and r is the quantity uou should choose.
1) n=12 (total quantity); r= 7
C(12,7)= 12!/(7! *(12-7)!)= 8*9*10*11*12/ (5*4*3*2)= 8*9*11= 72*11= 792
2) n=6 r=3
C(6,3)= 6!/ (3! * (6-3)!)= 6!/ (3!)^2= 4*5*6/ 3*2= 20.
3) C(9,5)= 9!/ (5!*4!)= 6*7*8*9/ (4*3*2*1)= 2*63= 126
4) You need to choose the whole set which consists of three components that has been defined. Multiply previous results
792*20*126= 1995840.