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NARA [144]
2 years ago
12

What is 50% of 20. ?

Mathematics
2 answers:
Leviafan [203]2 years ago
8 0

50% of 20 is 10.

Asking for 50% of something is like asking for half, therefore your answer is 10. :)

svet-max [94.6K]2 years ago
6 0

Answer:

it's literally 10 just divide

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A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year:
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Answer:

A.

mean = 724.2

Median = 715

Mode = 768

B.

Range = 85

Standard deviation = 29.30

C.

Interval = [665.6, 782.8]

Step-by-step explanation:

Number of samples n = 25

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A.

1. Mean = 18105/25

= 724.2

2. Median is the middle value when arranged from the least value to the highest = 715

3. Mode is the number with the highest frequency = 768 (occured two times)

B.

1. Range = highest value - lowest value

Highest value = 772

Lowest value = 687

772-687 = 85

2. Standard deviation = √(X-barX)²/n-1

= √20604/25-1

=√858.5

= 29.30

Please check attachment for the full calculation of the standard deviation

C.

Interval

[Mean - 2(sd), mean + 2(sd)]

= [724.2-2x29.3, 724.2+2x29.3]

=[665.6, 782.8]

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2 years ago
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Step-by-step explanation:

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6 0
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