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dmoore6859
07.07.2019 •
Mathematics
Mickael saltwood can paint 138 doors in 10 hours, while scott kepler can paint 59 doors in 5 hours. who can paint doors faster, mickael or scott?
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Ответ:
Ответ:
symmetric
Step-by-step explanation:
First we find the sample space of rolling two dice:
(1, 1); (1, 2); (1, 3); (1, 4); (1, 5); (1, 6)
(2, 1); (2, 2); (2, 3); (2, 4); (2, 5); (2, 6)
(3, 1); (3, 2); (3, 3); (3, 4); (3, 5); (3, 6)
(4, 1); (4, 2); (4, 3); (4, 4); (4, 5); (4, 6)
(5, 1); (5, 2); (5, 3); (5, 4); (5, 5); (5, 6)
(6, 1); (6, 2); (6, 3); (6, 4); (6, 5); (6, 6)
We want the difference of the dice; this gives us the sample space
0; -1; -2; -3; -4; -5;
1; 0; -1; -2; -3; -4;
2; 1; 0; -1; -2; -3;
3; 2; 1; 0; -1; -2
4; 3; 2; 1; 0; -2
5; 4; 3; 2; 1; 0
This makes the probability distribution:
X 5 4 3 2 1 0 -1 -2 -3 -4 -5
P(X) 1/36 2/36 3/36 4/36 5/36 6/36 5/36 4/36 3/36 2/36 1/36
Looking at the probabilities, we can see that the distribution is symmetric.