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2 years ago

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Mathematics

1 answer:

Simora [160]2 years ago

4 0

Using it's formula, it is found that the mean of the discrete random variable is given by:

B. 30.47.

<h3>What is the mean of a discrete distribution?</h3>

The expected value of a discrete distribution is given by the <u>sum of each outcome multiplied by it's respective probability</u>.

Hence, considering the table, the mean of the discrete distribution is:

E(X) = 23 x 0.16 + 25 x 0.09 + 26 x 0.18 + 31 x 0.12 + 34 x 0.24 + 38 x 0.21 = 30.47.

Hence option B is correct.

More can be learned about the mean of a discrete random variable at brainly.com/question/26660401

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What is S - 1/3= 7/9

marta [7]

Answer:

s = 10/9

Step-by-step explanation:

1. add 1/3 to both -1/3 and 7/9

2. the answer will be 10/9

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3 years ago

2(c-5) - 3<br> What is the answer?

Sveta_85 [38]

Step-by-step explanation:

2 · c - 5 · 2 - 3 = 2c - 10 - 3

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3 years ago

Estimate a 15% tip on a dinner bill of $52.87 by first rounding the bill amount to the nearest ten dollars.

Stels [109]

Answer:

$ 7.9

Step-by-step explanation:

Amount of bill = $52.87 = $52.9

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3 years ago

Jasons cutting a 2 2/5 meter string into sections that are 3/4. how many sections can he cut

astra-53 [7]

Answer:

3 1/5

Step-by-step explanation:

Okay, this is a standard division problem, so our equation is:

2 2/5 ÷ 3/4

but then we have to covert the mixed number to an improper fraction:

12/5 ÷ 3/4

do the cross thingy:

4/5 x 4/1 = 16/5 = 3 1/5

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3 years ago

Will give 50points Pleasee help urgent!

Lorico [155]

Answer:

a = 10; a = 2

Step-by-step explanation:

Step 1: Use the Pythagorean theorem to solve this equation

1. Orignal eqaution: (a + 2)² + (a - 5)² = (a + 3)²

2. Expand (a + 2)² + (a - 5)² which will give us 2a² - 6a + 29

3. Expand (a + 3)² giving us a² + 6a + 9

4. Simplified equation: 2a² - 6a + 29 = a² + 6a + 9

Step 2: Subtract 9 from both sides

1. 2a² - 6a + 29 - 9 = a² + 6a + 9 - 9

2. Simplify: 2a² - 6a + 20 = a² + 6a

Step 3: Subtract 6a from both sides

1. 2a² - 6a + 20 - 6a = a² + 6a - 6a

2. Simplify: 2a² -12a + 20 = a²

Step 4: Subtract a2 from both sides

1. 2a² - 12a + 20 - a² = a² - a²

2. Simplify: a² - 12a + 20 = 0

Step 5: Use the quadratic formula to solve for a

1. Quadratic formula: a = -b += √b² - 4ac/2a

2. Plug in the correct values: a = -(-12) += √(-12)² + 4(1)(20)/2(1)

3. Simplify the numerator and denominator: 12 += 8/2

4. Final equation: a = 12 - 8/2 or a = 12 + 8/2

5. Hence, the answer is 10 or 2

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2 years ago