queenkimm26
14.07.2019 •
Mathematics
My state's lottery has 30 white balls numbered from 1 through 30 and 20 red balls numbered from 1 through 20. in each lottery drawing, 3 of the white balls and 2 of the red balls are drawn. to win, you must match all 3 white balls and both red balls, without regard to the order in which they were drawn. how many possible different combinations may be drawn?
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Ответ:
The three whites:
(30 choose 1) * (29 choose 1) * (28 choose 1) = 30 * 29 * 28
The two reds:
(20 choose 1) * (19 choose 1) = 20 * 19
So, The three whites + two reds = 30 * 29 * 28 + 20 * 19 = 24740
Ответ:
D) 110
Step-by-step explanation: