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EleoNora [17]
3 years ago
10

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. Find the probabi

lity that a worker selected at random makes between $450 and $500.

Mathematics
2 answers:
AlekseyPX3 years ago
7 0

Answer:

$80

Step-by-step explanation:

400÷50= 80 which is the weekly rate of wages

miv72 [106K]3 years ago
7 0

Answer:

13.5

Step-by-step explanation:

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Suppose that the number of drivers who travel between a particular origin and destination during a designated time period has a
Bumek [7]

Answer:

0.381 is the probability that the number of drivers will be at most 18.                          

Step-by-step explanation:

We are given the following information in the question:

The number of drivers who travel between a particular origin and destination during a designated time period has a Poisson distribution with parameter μ = 20.

  • The Poisson distribution is the discrete probability distribution of the number of events occurring in a given time period, given the average number of times the event occurs over that time period.
  • The variance of Poisson distribution is equal to the mean of Poisson distribution.

a) P(number of drivers will be at most 18)

Formula:

P(X =k) = \displaystyle\frac{\mu^k e^{-\mu}}{k!}\\\\ \mu \text{ is the mean of the distribution}

P( x \leq 18) =P(x=0) + P(x =1) + P(x = 2) + ... + P(x = 18)\\\\= \displaystyle\frac{20^0 e^{-20}}{0!} + \displaystyle\frac{20^1 e^{-20}}{1!} +...+ \displaystyle\frac{20^{18} e^{-20}}{18!}\\\\ = 0.381

Thus, 0.381 is the probability that the number of drivers will be at most 18.

3 0
4 years ago
The equation of horizontal line passing through (3,-4) is​
Greeley [361]

Answer:

y = - 4

Step-by-step explanation:

The equation of a horizontal line parallel to the x- axis is

y = c

where c is the value of the y- coordinates the line passes through

The line passes through (3, - 4 ) with y- coordinate - 4 , then

y = - 4 ← equation of line

8 0
3 years ago
PLEASE HELP ASAP!!!!!!!! Number 18 please a-f 
riadik2000 [5.3K]
A. 80
b.100
c.80
d.80
e.20
f. 120

These are all in degrees.

Hope this helps. 
Foxeslair
7 0
3 years ago
Help for brainliest!
yKpoI14uk [10]

Answer:

I believe it's d but I could be wrong but I'd try it

5 0
3 years ago
When writing 3.7272727272... as a ratio of integers, what is the common ratio?
Law Incorporation [45]
The answer is:    "41 / 11 " ;  or, write as:  " 41 : 11 " .
__________________________________________________________
Explanation:
__________________________________________________________
72/99 = (72÷9) / (99÷9) = 8/ 11 . 

So, 3.727272727272...   =   "3 \frac{8}{11} " .

→  "3 \frac{8}{11} " =   [(11 *3) + 8] / 11 =  (33 + 8) / 11 = 41 / 11 .
__________________________________________________________
  "41 / 11" cannot be simplified any further; so the answer is:
__________________________________________________________
  "41 / 11 " ;  or, write as:  " 41 : 11 " .
__________________________________________________________
5 0
3 years ago
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