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3 years ago

Find the mean, median, and mode(s) of the data set. 3, 41 , 11, 3, 11, 5, 10

Mathematics

2 answers:

sergiy2304 [10]3 years ago

5 0

Answer: 3

Step-by-step explanation:

when looking for the mean you look in the middle, but it needs to be in the middle. Sometimes it will be a even number, in this case you have to do more math. Im a little rusty on this but im pretty sure its 3.

Alex_Xolod [135]3 years ago

3 0

mean=12

median=10

mode=3 and 11

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===================================================
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Read 2 more answers

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dezoksy [38]

Answer:

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Step-by-step explanation:

Let x km/h be Ed's rate in the evening, then x+1 km/h is his rate in the morning. It takes him

$\dfrac{12}{x+1}$ hours in the morning to pass 12 km;
$\dfrac{12}{x}$ hours in the evening to pass 12 km.

In total, it takes him 5 hours 24 minutes ( $5\dfrac{24}{60}=5.4$ hours), then

$\dfrac{12}{x+1}+\dfrac{12}{x}=5.4.$

Solve this equation:

$\dfrac{12x+12(x+1)}{(x+1)x}=5.4,\\ \\12x+12x+12=5.4x^2+5.4x,\\ \\5.4x^2 -18.6x-12=0,\\ \\54x^2-186x-120=0,\\ \\9x^2 -31x-20=0,\\ \\D=(-31)^2-4\cdot 9\cdot (-20)=1,681=41^2,\\ \\x_{1,2}=\dfrac{-(-31)\pm\sqrt{41^2}}{2\cdot 9}=\dfrac{31\pm41}{18}=-\dfrac{5}{9},\ 4\ km/h.$

Ed's rate cannot be negative, thus x=4 km/h. His morning rate is x+1=5 km/h.

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