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r-ruslan [8.4K]
3 years ago
6

What is the probability that mr. Jackson will roll a 4 at least 5 times out of his 30 rolls of a number cube?

Mathematics
1 answer:
Gre4nikov [31]3 years ago
3 0

Answer:

P(x<=5) = 0.6164

Step-by-step explanation:

The probability of getting a four in general throw = 1/6

Probability of getting 4,  5 times in a throw of 30 roll of cubes

= (1/6) ^5

 

                                                                             X P(X)

P ( X = 0) C (30,0) * 0.167^0 * ( 1 - 0.167)^30= 0 0.0042

P ( X = 1) = C (30,1) * 0.167^1 * ( 1 - 0.167)^29= 1 0.0253

P ( X = 2) = C (30,2) * 0.167^2 * ( 1 - 0.167)^28= 2 0.0733

P ( X = 3) = C (30,3) * 0.167^3 * ( 1 - 0.167)^27= 3 0.1368

P ( X = 4) = C (30,4) * 0.167^4 * ( 1 - 0.167)^26= 4 0.1847

P ( X = 5) = C (30,5) * 0.167^5 * ( 1 - 0.167)^25= 5 0.1921

P(x<=5) = 0.6164

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Mr. Young is offered an investment opportunity. Kyra says she will invest his money at a 6% simple interest rate over the next 7
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Answer:

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Step-by-step explanation:

Given that:

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To find:

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Solution:

Formula for Simple Interest :

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Simple\ Interest = \dfrac{3000\times 6\times 7}{100}\\\Rightarrow Simple\ Interest = \dfrac{12600}{100}\\Simple\ Interest = \$126

Therefore, the answer is:

Interest earned is <em>$126</em>.

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
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Answer:  C & D

<u>Step-by-step explanation:</u>

A binomial experiment must satisfy ALL four of the following:

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A) When the spinner is spun three times, X is the sum of the numbers the spinner lands on.

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B) When the spinner is spun multiple times ...

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C)  When the spinner is spun four times, X is the number of times the spinner does not land on an odd number.

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D) When the spinner is spun five times, X is the number of times the spinner lands on 1.

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I found this answer from Brainly.

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