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pychu [463]
3 years ago
13

Excerpt from a school newspaper:

Mathematics
2 answers:
maria [59]3 years ago
6 0

Answer:

A


Step-by-step explanation:

  • During 2008-2009 session, 20% of students were in A-B Honor Roll.
  • During 2009-2010, 200 out of 1000 students were in A-B Honor Roll. What's that in percentage? We divide 200 by 1000 and then multiply by 100:

\frac{200}{1000}=0.2*100=20

So, that's also 20%. That's the same as 2008-2009 session, so the principal is wronged!


Option A is correct: "<em><u>A) There was no change in the number of students on honor roll from one year to the next."</u></em>

Anika [276]3 years ago
5 0
A) There was no change in the number of students on honor roll from one year to the next. This is noticeable because 200/1000 = .2 just as 20%/100% = .2 or 20/100 = .2. So there never was a change! 
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3 years ago
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5 0
3 years ago
Approximately 1 in 28 people of Ashkenazi Jewish descent are Tay-Sachs carriers. In randomly sampling one man and one woman from
allsm [11]

Answer:

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b) the probability that both are carriers is 0.001276

Step-by-step explanation:

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1 in 28 people of Ashkenazi jewish descent are Tay-Sachs carrier.

so P(Carrier) = 1/28 =

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Therefore the probability that both are carriers is 0.001276

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