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3 years ago

What is the average 27, 12, 31, 19, 23, 11, 17

Mathematics

2 answers:

zhannawk [14.2K]3 years ago

8 0

Answer: $20$

Step-by-step explanation:

1) Put the numbers in order: $11,12,17,19,23,27,31$

2) Find the sum: $140$

3) Divde 140 by the total numbers: $18.769875523239$

Range: $20$

Largest Number: $31$

Smallest Number: $11$

Divide: $140/7$ and get $20$

valentinak56 [21]3 years ago

7 0

So to find average, we add up the values, and divide it by how many values there are in total.

27 + 12 + 31 + 19 + 23 + 11 + 17 = 140.

There are 7 numbers. Which means we divide 140 by 7.

140 / 7 = 20 is the average.

Also, if you notice, most of the numbers "kind of" circulate around 20.

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Two sides of a triangle have the same length. The third side measures 4 m less than twice the common length. The perimeter of th

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Answer:

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3 years ago

Simplify negative 5 minus the square root of negative 44 negative 5 minus 4 times the square root of 11 i negative 5 minus 4 i t

Anika [276]

Answer:

$-5-\sqrt{-44}=-5-2\sqrt{11}i$

Step-by-step explanation:

We want to simplify:

$-5-\sqrt{-44}$

We rewrite the expression under the radical sign to obtain:

$-5-\sqrt{4\times11\times -1}$

We split the expression under the radical sign to get:

$-5-\sqrt{4} \times \sqrt{11} \times \sqrt{-1}$

Recall that:

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This implies that:

$-5-\sqrt{4} \times \sqrt{11} \times \sqrt{-1}=-5-2\sqrt{11}i$

Therefore $-5-\sqrt{-44}=-5-2\sqrt{11}i$

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3 years ago

The ratio of chaperones to students on a field trip to New York City is 2 to 11. If there are 297 students on the trip, how many

Olenka [21]

297/11 = 27

So we have 27 groups of 11 students. If there are 2 chaperones for every 11 students, then we can do:

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2 years ago

One third of a number

rodikova [14]

Well the thing is you didn't tell us which number but if it is 12 then i strongly believe that the answer is 3/9

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3 years ago

Read 2 more answers

A recent survey found that 7575% of all adults over 50 wear glasses for driving. In a random sample of 4040 adults over 50, wh

malfutka [58]

Answer:

Mean = 30

standard Deviation = 2.74

Step-by-step explanation:

Formula

mean = np

Standard Deviation = $\sqrt{npq}$

from the question = 40

P = 75% or 0.75

q = 1 - p = 1 - 75% or 1 - 0.75

To find mean

mean = 40 x 0.75

= 30

For Standard Deviation (SD)

Standard Deviation = $\sqrt{npq}$

= $\sqrt{40 X 0.75 X 0.25$

= $\sqrt{7.5}$

:. Standard Deviation = 2.74

5 0

2 years ago