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3 years ago

The table shows the probability distribution of siblings of students in a high

Mathematics

2 answers:

sammy [17]3 years ago

7 0

Answer:

The expected number of siblings is 1.05 or 1 (when rounded)

Step-by-step explanation:

Given the probability distribution of siblings of students in a high school with 1500 students:

$\begin{array}{ccccccc}\text{Number of Siblings}&0&1&2&3&4&5\\ \\\text{Probabilities}&0.19&0.67&0.08&0.03&0.02&0.01\end{array}$

To find the expected value for the number of siblings of a randomly chosen student, myltiply the number of siblings by its probability and add all these products:

$0\cdot 0.19+1\cdot 0.67+2\cdot 0.08+3\cdot 0.03+4\cdot 0.02+5\cdot 0.01\\ \\=0.67+0.16+0.09+0.08+0.05\\ \\=1.05$

Thus, the expected number of siblings is 1.05 or 1 (when rounded)

Ostrovityanka [42]3 years ago

5 0

Answer: it’s 1.05 :)

Step-by-step explanation:

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N76 [4]

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Step-by-step explanation:

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3 years ago

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Tom [10]

Answer:

Option A) Todd is older than 32

Step-by-step explanation:

we have

$\frac{1}{2}x-6>10$

Solve for x

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$\frac{1}{2}x>10+6\\\\\frac{1}{2}x>16$

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3 years ago

how much wrapping paper would you need to cover a rectangular that is 18.25 inches by 12inches by 3 inches if you need 10% more

natita [175]

Answer: 681 square inch

Step-by-step explanation:

Hi, we have to apply the formula for the surface area:

A = 2wl + 2lh + 2hw

Where:

w: width

l: length

h: height

Replacing with the values given:

A = (2x12x18.25) + (2x12x3)+(2x18.25x3)

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Adding that value to the surface area

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3 years ago

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Virty [35]

Answer:

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Step-by-step explanation:

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