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kari74 [83]
3 years ago
8

Someone please help me in this I don’t want to fail..please..I’m so bad at math..

Mathematics
1 answer:
Law Incorporation [45]3 years ago
6 0

Answer:

i think your answer would be d

Step-by-step explanation:

hope this helps!

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What is the probability of selection for any man in a proportionate random sample, where a sample of 100 will be drawn from a po
kolbaska11 [484]
Working Principle: Stratified Random Sampling

nx = (Nx/N)*n

where:
    nx = sample size for stratum x
    Nx = population size for stratum x
    N = total population size 
    n = total sample size

Given:

  Nx = 100
  N = 1000
  n = 0.5*(1000) = 500

Required: Probability of Man to be selected

Solution:

nx = (Nx/N)*n
nx = (100/1000)*500 = 50 men

ny = (Nx/N)*n
ny = (100/1000)*500 = 50 women


Probability of Man to be selected = nx/(nx + ny)*100 = 50/(50+50)*100 = 50%

<em>ANSWER: 50%</em>
7 0
3 years ago
If tatianna works 3hrs a day on school days and make $123.75 a week what is her hourly rate?​
madreJ [45]

<u><em>Answer:</em></u>

Her hourly rate is $8.25

<u><em>Explanation:</em></u>

Tatianna works 3 hours a day on school days and makes a total of $123.75 in a week

<u>We know that:</u>

There are 5 school days in a week

<u>We are given that:</u>

She works for 3 hours a day each of those days

<u>Therefore:</u>

Total number of hours worked = hours worked daily * number of days

Total number of hours worked = 3 * 5 = 15 hours in a week

<u>The equation used to calculate Tatianna's earnings is:</u>

Amount she makes in a week = Total number of hours worked * hourly rate

<u>Now, we substitute with the givens to get the hourly rate as follows:</u>

Amount she makes in a week = Total number of hours worked * hourly rate

123.75 = 15 * hourly rate

Hourly rate = $8.25

6 0
3 years ago
Aubrey's dinner cost $85. She tips the waitstaff 30%, for excellent service.
Olin [163]
30% is equal to 0.3 (found by dividing the percentage by 100). Then we multiply the cost of dinner, $85, by 0.3 to find an answer of $25.50.

Answer: $25.50
6 0
2 years ago
PLEASE HELP ME
lyudmila [28]
As seen, the graph is pointing/increasing upwards. This means that the graph is exponentially increasing. 

You notice there are significantly more spores at 4th hour than the first, therefore, this is an increasing trend. 

Hope I helped :) 
6 0
3 years ago
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The ratio of the perimeter of square RSTU to the perimeter of square WXYZ is 1 to 2. The area of square RSTU is 81 square inches
Vlad1618 [11]
The answer would be 25.5 inches.
4 0
3 years ago
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