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belka [17]
3 years ago
7

A teacher gives each of five students a box that contains 25 red balls, 25 blue balls, 25 green balls, and 25 purple balls. The

students each picked a different number of balls out of their box and recorded their results in this table. What can you conclude from the table?
A) The more balls a student picked, the closer she or he came to the expected number per color.

B) The student who picked 10 balls came closest to the expected number of balls per color.

C) The fewer balls a student picked, the closer she or he came to the expected number per color.

D) The student who picked 15 balls came closest to the expected number of balls per color.
Mathematics
1 answer:
liubo4ka [24]3 years ago
8 0
The answer is a the more balls means the more chance a desired color will be chosen
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PLEASE HELP!! I WILL BRAINLIEST
ArbitrLikvidat [17]

Answer:

81.8%

Step-by-step explanation:

Mean = \mu = 40

Standard deviation = \sigma = 5

Now we are supposed to find out what percent of the numbers fall between 35 and 50

z = \frac{x-\mu}{\sigma}

Substitute the values

z = \frac{x-40}{5}

Now for P(35<x<50)

Substitute x = 35

z = \frac{35-40}{5}

z =-1

Substitute x = 50

z = \frac{50-40}{5}

z =2

So, P(-1<z<2)

P(z<2)-P(z<-1)

=0.9772-0.1587

=0.8185

= 0.818 \times 100

=81.8%

Hence  81.8% percent of the numbers fall between 35 and 50

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Answer:

The answer is probably A

Step-by-step explanation:

Its domain is the only one of these that contain -2, which is a real number.

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