kenziepickup
01.04.2022 •
Mathematics
A box contains 7 balls numbered 1,2,3,4,5,6,7. Three balls are drawn at random and without replacement. Let X be the number of 2's drawn in the experiment.
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Ответ:
cross multiply
(7)(g) = (2)(63)
7g = 126
g = 126/7
g = 18
so they sold 63 red apples and 18 green apples...for a total of (63 + 18) = 81 apples sold