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AveGali [126]
2 years ago
13

Marta got 88 points on her English test. Sandy got x points on the same test. What was their average

Mathematics
2 answers:
Anastasy [175]2 years ago
7 0

Answer: (88+x)/2

Explanation: In order to find average, add all the numbers and divide it by how many numbers you added. So,

(88 + x)/2

Nothing else was given so I could only find this equation.

Brainliest please if I am correct. Hope it helped!

zlopas [31]2 years ago
3 0

Answer:

Their average score was 88 + x / 2.

Step-by-step explanation:

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Savatey [412]

To find the expected value of the distribution, we multiply each outcome by it's probability. Doing this, we get that the expected value of defects on a skateboard is of \frac{4}{25}.

Outcomes and probabilities:

0 defects, 9/10 probability

1 defect, 1/20 probability

2 defects, 1/25 probability

3 defects, 1/100 probability.

Expected value:

E(X) = 0\frac{9}{10} + \frac{1}{20} + 2\frac{1}{25} + 3\frac{1}{100} = \frac{1}{20} + \frac{2}{25} + \frac{3}{100} = \frac{5 + 8 + 3}{100} = \frac{16}{100}

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\frac{4}{25}

Thus, the expected value of defects on a skateboard is of \frac{4}{25}.

A similar problem is given at: brainly.com/question/23156292.

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