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kherson [118]
3 years ago
7

at middleton middle school, marianne musf score and average of at least 80 points of 4 tests before she can apply for the schola

rship. if she scored 79 81 and 77 for the first three tests, what must she score on her last test?
Mathematics
2 answers:
Colt1911 [192]3 years ago
6 0
The answer is 83, using the equation of 320-79-81-77=x and X is equal to 83
Illusion [34]3 years ago
5 0

the answer is 83, using the equation of 320-79-81-77=x and X is equal to 83

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3 years ago
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Assoli18 [71]

Answer:

% error = 3.3%

Step-by-step explanation:

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In a production process, the probability of manufacturing a defective rear view mirror for a car is 0.075. Assume that the quali
Leviafan [203]

Answer:

The probability that the 3rd defective mirror is the 10th mirror examined = 0.0088

Step-by-step explanation:

Given that:

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To find the probability that the 3rd defective mirror is the 10th mirror examined:

Let X be the random variable that follows a negative Binomial expression.

Then;

X \sim  -ve  \ Bin (k = 3 , p = 0.075)\\ \\ P(X=x)= \bigg (^{x-1}_{k-1}\bigg)\times P^k\times (1-P)^{x-k}

= \bigg (^{10-1}_{3-1}\bigg)\times 0.075^3\times (1-0.075)^{10-3}

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= \dfrac{9!}{2!(9-2)!}\times 0.075^3\times (0.925)^{7}

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kykrilka [37]
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3 years ago
Read 2 more answers
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