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h2o12
20.01.2021 •
Mathematics
A lobster never stops growing and can live as long as 100 years,
The estimated ages and weights of 11 lobsters were recorded
on the scatter plot below. Using this data, which is the most
reasonable prediction of the weight of a lobster whose estimated
age is 25 years?
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Ответ:
The sample space of rolling two dice has 36 possible outcomes. Remember that the "sample space" is a set which contains all possible outcomes.
(1,1) (2,1) (3,1) (4,1) (5,1) (6,1)
(1,2) (2,2) (3,2) (4,2) (5,2) (6,2)
(1,3) (2,3) (3,3) (4,3) (5,3) (6,3)
(1,4) (2,4) (3,4) (4,4) (5,4) (6,4)
(1,5) (2,5) (3,5) (4,5) (5,5) (6,5)
(1,6) (2,6) (3,6) (4,6) (5,6) (6,6)
The probability of rolling a 2 is 1/36.
The probability of rolling a 3 is 2/36.
The probability of rolling a 4 is 3/36.
The probability of rolling a 5 is 4/36.
The probability of rolling a 6 is 5/36.
The probability of rolling a 7 is 6/36.
The probability of rolling an 8 is 5/36.
The probability of rolling a 9 is 4/36.
The probability of rolling a 10 is 3/36.
The probability of rolling an 11 is 2/36.
The probability of rolling a 12 is 1/36.
Using these probabilities, you can answer your questions:
Probability of rolling a number bigger than 7 is the sum of the probabilities of rolling an 8, 9, 10, 11, and 12.
5/36 + 4/36 + 3/36 + 2/36 + 1/36 = 15/36 which reduces to 5/12
Probability of rolling a number divisible by 4 is the sum of the probabilities of rolling a 4, 8, and 12.
3/36 + 5/36 + 1/36 = 9/36 which reduces to 1/4.
Hope this helps.