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oksano4ka [1.4K]
3 years ago
13

There are 6 chemical elements represented by Li, Na, Mg, Rb, Cs, and Fr that

Mathematics
2 answers:
Bumek [7]3 years ago
5 0

Answer:

1/6

Step-by-step explanation:

I think this is tricky.

when you randomly choose the 1st two times, it doesn't matter as long as Na was not chosen, otherwise the probability would become ZERO for the 3rd one be Na.

So, after 1st two is removed, there are only 4 left in the pool, so picking Na at the 3rd draw is 1/4 probability.

But, come to think of it, when 1st draw, you have to draw the other 5 out of 6, 2nd draw the 4 out of 5, then 3rd is 1 Na out of the 4.

So, 5/6 x 4/5 x 1/4 = 1/6

serg [7]3 years ago
4 0
The answer is going to be 1/6
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Answer:

219 employees

Step-by-step explanation:

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3\% \: of \: 810 \: employees

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Witch fraction is equivalent to 4/20
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2/10

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3 years ago
I can read a 336-page book in 6 hours. Jayne can read a 144-page book in 3 hours. If I start reading a 5000-page book at noon an
dimulka [17.4K]

Answer:

12:00 am midnight

Step-by-step explanation:

Given;

I can read a 336-page book in 6 hours.

My rate r1 = 336/6 pages per hour = 56 pages per hour

Jayne can read a 144-page book in 3 hours.

Jayne rate r2 = 144/3 = 48 pages per hour

If I start reading a 5000-page book at noon and Jayne starts reading the same book at 10 AM

Taking 10 am as the reference time.

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For me;

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For Jayne;

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Time t2 = x

For them to be on the same page they must have read the same number of pages;

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Substituting the values;

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3 years ago
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Answer:

ab(ab + 20)

Step-by-step explanation:

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