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KATRIN_1 [288]
3 years ago
6

What is p (not 3) ? You roll a fair 6-sided die

Mathematics
2 answers:
AlladinOne [14]3 years ago
6 0

Answer:

P(not3)=5/6=.83

Step-by-step explanation:

Find probability of a die that didn’t have a 3 means that it could have a 1,2,4,5,6. This is 5out of 6.

5/6=.83

EleoNora [17]3 years ago
4 0

Answer:

0.83

Step-by-step explanation:

There are six sides of a dice and you are trying to find the probabilty of rolling anything other then a three. That leaves you with 5 out of 6 sides that you can roll. Fraction is 5/6. 5/6 as a decimal is 0.83

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Assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are n= 8 trials, each with
alina1380 [7]

Answer:

0.80589

Step-by-step explanation:

So all of the numbers of correct answers less than 4 are 0,1,2,3

We need to calculate the probability for each separately and then add them together.

To find the probability we have to first find the combination. We know that there’s n=8 trials and that p=0.3. So 1-0.3 gives us 0.7.

The combination formula is: ! / (!(−)!)

So the n would always =8, and the r would be 0,1,2,3. So you would have to calculate it for 0,1,2,3 Separately. This can be done by hand or you can use a simple combinations calculator online.

For 0;

The combination is 1,

1 x 0.3^0 x 0.7^8-0 =

0.057648

For 1;

The combination is 8,

8 x 0.3^1 x 0.7^8-1 =

0.19765

For 2;

The combination is 28

28 x 0.3^2 x 0.7^8-2 =

0.296475

For 3;

The combination is 56

56 x 0.3^3 x 0.7^8-3 =

0.254122

All that’s left is to add these four numbers;

0.057647 + 0.19765 + 0.296475 + 0.254122 = 0.80589

4 0
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