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cgattis6935
21.07.2019 •
Mathematics
11 black balls and 14 white balls are placed in an urn. two balls are then drawn in succession. what is the probability that the second ball drawn is a white ball if the second ball is drawn without replacing the first ball?
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Ответ:
The probability that the second ball drawn is a white ball if the second ball is drawn without replacing the first ball is;
P(second ball being white) = 42/75
We are told there are;
Number of black balls = 11
Number of white balls = 14
Total number of balls = 25 balls
Since 2 balls are drawn without replacement, then;
possible number of ways of drawing the two balls = 25 × 24 = 600
Now, to find the probability of drawing two white balls;
Probability the first ball being white and second white = (14/25 × 13/24) = 91/300
Probability of the first ball being black and the second being white = (11/25 × 14/24) = 77/300
Thus;
P(second ball being white) = (91/300) + (77/300)
P(second ball being white) = 168/300 = 42/75
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Ответ:
Ответ:
Y≥6
Step-by-step explanation:
Solid line means ___ or equal to, and since it goes from 6 down, it is less than, so less than or equal to.