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goldfiish [28.3K]
3 years ago
5

What is the answer: 15 + 22(4 + 11) = x

Mathematics
2 answers:
Sidana [21]3 years ago
5 0
52
Because 4 + 11 = 15 15 + 15+ 22
kupik [55]3 years ago
3 0
15+22(4+11)=x
4+11=15
22*15=330
15+330=345
x=345
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The Ohio Department of Agriculture tested 203 fuel samples across the state in 1999 for accuracy of the reported octane level. F
OlgaM077 [116]

Answer:

The Sample size is 1918.89035

Step-by-step explanation:

Consider the provided information.

It is given that 14 out of 105 samples failed.

Therefore p = 14/105 = 0.13 3... and q=1-0.133=0.867

Samples would be needed to create a 99 percent confidence interval.

Subtract the confidence level from 1, then divide by two.

\frac{(1 -0.99)}{2}=0.005

By standard normal table z=2.5758≈2.58

Calculate the sample size as:

n=\frac{z^2pq}{e^2}

Where,  e is the margin of error,

Substitute the respective values.

n=\frac{(2.58)^2(0.133)(0.867)}{(0.02)^2}=1918.89

Hence, the Sample size is 1918.89035

4 0
3 years ago
In a survey of 120 adult , 88 drink cold drink and 26 drink soft drink. If 17 of them drink neither of them, findout the number
12345 [234]
Answer: 11 people

Explanation:

Find the total people who actually drink something:

120 - 17 = 103

Find the sum of people who drink cold and soft drink:

88 + 26 = 114

Find the people who drinks both:

114 - 103 = 11 people
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