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Zinaida [17]
3 years ago
10

Are 16% of M&M’s Green? Mars, Inc. claims that 16% of its M&M plain candies are green. A sample of 100 M&Ms is rando

mly selected. a. Find the mean and standard deviation for the numbers of green M&Ms in such groups of 100. b. Data Set 18 in Appendix B consists of a random sample of 100 M&Ms in which 19 are green. Is this result unusual? Does it seem that the claimed rate of 16% is wrong?
Mathematics
1 answer:
wolverine [178]3 years ago
4 0

Answer: This result is not unusual.

So, it does not seem that the claimed rate of 16% is  wrong

Step-by-step explanation:

Since we have given that

n = 100

p = 0.16

q = 1 - 0.16 = 0.84

So, Mean would be

np=100\times 0.16=16

and standard deviation would be

\sqrt{np(1-p)}=\sqrt{100\times 0.16\times 0.84}=3.67

Now, if there are 19 green,

so, we will check how it is far,

\dfrac{19-16}{3.67}=\dfrac{3}{3.67}=0.817

Since it is 0.817 standard deviations away from the mean.

So, this result is not unusual.

So, it does not seem that the claimed rate of 16% is  wrong.

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Ryan planted 125 trees on my tree farm 28% of rum or maple trees and the rest of them are pine trees. Kioshi helped plant 125 tr
VashaNatasha [74]

Answer:

Ryan planted more maple trees than Kioshi.

Step-by-step explanation:

Given:

Total number of tress planted by Ryan = 125

Percent of maples tree planted by Ryan = 28%

Total number of tress planted by Kioshi = 125

We need to find who planted more maple trees.

Solution:

First we will find the number of maple tree planted by Ryan.

So we can say that;

the number of maple tree planted by Ryan is equal to Percent of maples tree planted by Ryan multiplied by Total number of tress planted by Ryan and then divided by 100.

framing in equation form we get;

the number of maple tree planted by Ryan = \frac{28}{100}\times 125 = 35

Hence Ryan planted 35 maple trees on the tree farm.

Now we will find number of maple tree planted by Kioshi.

But Given:

or every maple trees there are four pine trees

Let the number of maple tree planted by Kioshi be 'x'.

Number of pine trees = 4x

Now we know that;

Total number of tress planted by Kioshi is equal to sum of Number of pine trees and number of maple tree.

framing in equation form we get;

x+4x=125\\\\5x=125

Dividing both side by 5 we get;

\frac{5x}{5}=\frac{125}{5}\\\\x=25

Hence Kioshi planted 25 maple trees in the park.

So we can say that.

Ryan planted more maple trees than Kioshi.

7 0
3 years ago
What is a good estimate for 380% of 20
Ostrovityanka [42]

Answer:

380 divided by 20 is your answer

Step-by-step explanation:

7 0
2 years ago
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algol [13]
I can answer this for u
8 0
3 years ago
Read 2 more answers
Four times the square of a number is thirty-six"
natka813 [3]
Well first do 36 divided by 4, which is 9, then square root 9 to make it 3, so your answer should be 3
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HELP ME PLEASE!!! I WILL MARK YOU AS A BRAINLIEST!!
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Answer:

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Step-by-step explanation:

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