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Irina-Kira [14]
1 year ago
7

Find the probability of seeing at least 6 dots, but less than 10 dots when 2 fair dice are rolled.

Mathematics
1 answer:
liubo4ka [24]1 year ago
5 0

The probability of seeing at least 6 dots, but less than 10 dots when  2 fair dice are rolled is 20/36 or 5/9.

<h3>what is probability?</h3>

Probability is the ratio of favorable outcomes to the total possible outcomes of an event.

P(X) =n(X)/n(S)

Where the total possible outcomes are given by the sample space S and the event is X.

<h3>Calculation:</h3>

When two dice are rolled, the possible outcomes are 36.

The sample space is as follows:

{(1,1), (1,2), (1,3), (1,4), (1,5), (1,6),

(2,1), (2,2), (2,3), (2,4), (2,5), (2,6).

(3,1), (3,2), (3,3), (3,4), (3,5), (3,6),

(4,1), (4,2), (4,3), (4,4), (4,5), (4,6),

(5,1), (5,2), (5,3), (5,4), (5,5), (5,6),

(6,1), (6,2), (6,3), (6,4), (6,5), (6,6)}

I.e., n(S) = 36

From the about the favorable outcomes of the event - the dice showing at least 6 but less than 10 dots (sum of dots on two dice) are:

{(1,5), (1,6), (2,4), (2,5), (2,6), (3,3), (3,4), (3,5), (3,6), (4,2), (4,3), (4,4), (4,5), (5,1), (5,2), (5,3), (5,4), (6,1), (6,2), (6,3)}

Thus, there are 20 such favorable outcomes. I.e., n(X) = 20

Then, the required probability is

P(X) = n(X)/n(S)

      = 20/36

      = 5/9

Therefore, the required probability is 5/9.

Learn more about probability here:

brainly.com/question/23955312

#SPJ4

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Answer:

<em>71.6 degrees </em>

Step-by-step explanation:

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u.v = 36

|u| = √8²+4²

|u| = √64+16

|u| = √80

|v| = √9²+(-9)²

|v| = √81+81

|v| = √162

36 = √80*√162 cos theta

36 = √12960 cos theta

36 = 113.84 cos theta

cos theta = 36/113.84

cos theta = 36/113.84

cos theta = 0.3162

theta = arccos (0.3162)

<em>theta = 71.6 degrees </em>

<em>Hence the angle between the given vectors is 71.6 degrees </em>

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Answer:

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Step-by-step explanation:

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\sf Since \;\sqrt{\boxed{64}}=\boxed{8}\;and\;\sqrt{\boxed{81}}=\boxed{9}\; \textsf{it is known that $\sqrt{75}$ is between}\\\\\sf \boxed{8}\;and\;\boxed{9}\;.

See the attachment for the correct placement of \sf \sqrt{75} on the number line.

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3/5+(-7/40)

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