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lilyforeman5867
11.07.2019 •
Mathematics
An urn contains 25 marbles. 15 are red, 8 are orange, and 2 are blue. you select two marbles. what is the probability of getting a red marble on the first draw and an orange marble on the second draw if you select
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Ответ:
The total number of marbles in the urn = 25 marbles
Number of red marbles in the urn = 15 marbles
The probability of picking the first one as red = Number of red marbles/ total number of marbles = 15/25 = 3/5
Now, for the second draw, number of marbles = 24 (Since you already picked one)
Total number of orange marbles = 8
The probability of picking the second one as orange = Number of orange marbles/ total number of marbles = 8/24 = 1/3
Probability of picking a red in the first draw and an orange in the next draw =3/5*1/3 = 1/5
Probability of picking a red in the first draw and an orange in the second draw = 1/5
Ответ:
D. 9
Step-by-step explanation: