The number of men in a tour group is 15 times the number of women. If there are 48 people in the group, how many are men?
2 answers:
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Answer:
The weight of one rooster is 3 Kg and the weight of one hen is 2 Kg
Step-by-step explanation:
<u><em>The question in English is</em></u>
Two roosters weigh as much as 3 chickens. Eight roosters and 9 hens weigh 42 kg. How much does a rooster weigh and how much does a hen weigh, knowing that all roosters have the same weight, respectively the hens weigh the same.
Let
x ----> the weight of one rooster in kilograms
y ----> the weight of one hen in kilograms
we know that
------> equation A
----> equation B
Solve the system by graphing
Remember that
The solution of the system of equations is the intersection point both graphs
The solution is the point (3,2)
see the attached figure
therefore
The weight of one rooster is 3 Kg and the weight of one hen is 2 Kg
Answer:
Step-by-step explanation:
From the given information:
The null hypothesis is:
The alternative hypothesis is:
The sample size n = 35
Sample mean = 7.91
variance = 0.03
Standard deviation =
The t-test statistics is computed as:
t = - 3.0741
Degree of freedom:
df = n - 1
df = 35 - 1
df = 34
Level of significance = 1 - C.I
= 1 - 0.99
= 0.01
The t_{critical} value for the two-tailed test at 0.01 is within the rejection region:
Decision rule: To reject if
As fails the rejection region, we reject
Conclusion: There is sufficient evidence to believe that the machine will not dispense 8 ounces & and it must be stopped for repairs.