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3 years ago

Answer please. Need help I'm giving a follow, a thanks, and a brainliest.

Mathematics

2 answers:

Misha Larkins [42]3 years ago

6 0

mean =add them all up and divide by the number of points

(17.2+18.3+14.9+16.8+15.3)/5

82.5/5

16.5

Choice B

GalinKa [24]3 years ago

3 0

16.5

Add the data set together and then divide by 5, or how many numbers are in the data set

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I'm trying to find the answer to this please help!

timofeeve [1]

Ion know bro you tryna help me

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3 years ago

The number of books borrowed from a library each week follows a normal distribution. When a sample is taken for several weeks, t

Marat540 [252]

$\mathbb P(X>250)=\mathbb P\left(\dfrac{X-190}{30}>\dfrac{250-190}{30}\right)=\mathbb P(Z>2)\approx0.0228$

Or, if you're familiar with the empirical rule and the basic properties of the normal distribution, you can use the fact that approximately $95/%$ of the distribution lies within two standard deviations of the mean, or

$\mathbb P(|Z|$

which means about $5\%$ of the distribution lies outside this interval, or

$\mathbb P((-22))\approx0.05$

Because the distribution is symmetric, you have

$\mathbb P(-22)$
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8 0

3 years ago

Read 2 more answers

A standard deck of playing cards has 52 cards: 13 spades, 13 clubs, 13 hearts, and 13 diamonds. What is the probability of drawi

cestrela7 [59]

13/ 52 = 1/4 chances.

There are 13 spades and 52 cards. You divide the spades and cards in the deck to find your chances of drawing one.

You have a 25% chance of getting a spade.

Now you put it back. Since you put it back, you still have the same number of cards and the same number of spades. So when you divide 13/52 again, the numbers are still the same. 1/4. 25% chance.

So, you still have a 25% chance the second time around.

5 0

3 years ago

How do u slove this and whats the answer. 2b + 9x + (2 + 5)

e-lub [12.9K]

2b + 9x +(2 + 5).

2b + 9x + 7=2b + 9x + 7

4 0

3 years ago

PLEASE HELP ME.

pshichka [43]

Answer:

B, B, A

Step-by-step explanation:

I don't know number 4 answer. hope I helped

7 0

3 years ago