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erma4kov [3.2K]
3 years ago
7

Please Help?!?!?!? 3 1/10 - 1 1/5

Mathematics
1 answer:
Dominik [7]3 years ago
4 0
The answer is 1 9/10
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In a certain class, the ratio of girls to boys was 5 to 4. If there are 80 boys in the class, how many students are there in all
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there are 180 students in the entire class


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2 years ago
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Find the probability of a least one birthday match among a group of 44 people.
Cerrena [4.2K]

Answer:

0.1137= 11.37%

Step-by-step explanation:

Assuming there are 365 days in one year and every people have 1 birthday, then the chance for two people to have the same birthday is 1/365 and the chance they are not is 364/365. We are asked the chance for at least one match among 44 people. The opposite of the condition is that we have 0 matches and easier to calculate. The calculation will be:

P(X>=1)= ~P(X=0) = 1

P(X>=1)=- P(X=0)

P(X>=1)=1 - (364/365)^44

P(X>=1)=1- 0.8862

P(X>=1)=11.37%

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3 years ago
Nadia charges $6.50 an hour for babysitting. She babysits 16.50 hours the first week of the month and 22 hours the second week o
Sveta_85 [38]
She would need to work for 35 hours.

She earned $250.25 total the first two weeks, so divide that by the new rate per hour, $7.15, to get the 35 hours.
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3 years ago
Explain how the exteriorv relates to the i
OverLord2011 [107]

Step-by-step explanation:

in this situation

A+B =D

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Which of the following expressions is equivalent to 12x-3+2x+13
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You need to give us the answer choices

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