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Leona [35]
3 years ago
11

3 1/2 + 1 1/3 + 2 1/4

Mathematics
1 answer:
Alina [70]3 years ago
6 0
⭐️- The answer above is incorrect:

1. 3 1/2 + 1 1/3 + 2 1/4
2. 14 5/6 + 2 1/4
3. 17 1/12
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Consider a multiple choice exam with 10 questions, and with 4 possible answers to each question (labeled A, B, C, and D). 1a. Wh
mrs_skeptik [129]

Answer:

(1a) 9.54e-07 (1b) 0.9437 (2) 10^8

Step-by-step explanation:

We have n = 10 questions. For each question in the multiple choice exam, we can choose the correct answer with probability p = 0.25 or an incorrect answer with probability q = 0.75 (just by guessing). Besides is reasonable to believe that questions are independent. Let X be the random variable that represents the number of correct answers (just by guessing) observed during the n = 10 questions, so, X have a binomial distribution.

(a) The probability of getting a perfect score just by guessing is

P(X = 10) = 10C10(0.25)^{10}(0.75)^{10-10} = 9.54e-07

(b) The probability of getting at least one question correct, just by guessing

P(X\geq1) = \sum_{x=1}^{x=10}10Cx(0.25)^{x}(0.75)^{(10-x)} = 0.9437

2. Each RUID is 9-digits long, there are 10 digits, each of the nine positions for a digit of the RUID has 10 posibilities except the 4th and 5th positions which must be both 0. For the multiplication rule there can be (10)^3(1)(1)(10)^5 = 10^8 different RUIDS.

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3 years ago
Karli's shadow is 60inches long. A nearby fire hydrant cast a shadow 40inches Long. If Kali is 48 inches tAll what is the height
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This question involves ratios.You will use them as fractions.

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60/48 = 40/x

Now you'll cross multiply:

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Divide both sides by 60.

1920/60 = 32.

The fire hydrant is 32 inches tall.


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Hope this helps!

https://www.omnicalculator.com/math/radius-of-sphere
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A meter stick is about 3 yards longer
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