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deff fn [24]
2 years ago
12

8+4-{-2-[5+(2-7)-(5-15)+20]+6-3}+8​

Mathematics
2 answers:
Shkiper50 [21]2 years ago
7 0

Answer:

-15

Step-by-step explanation:

=8+4-{-2-[5+2-7-5+15+20]+6-3}+8

=12+2-5-2+7+5-15-20+3+8

=14-7+12-35+11

=7-23+11

=18-23

=-15

am not shore

Phantasy [73]2 years ago
5 0

Answer:

Your answer should be 49

Step-by-step explanation:

Hope this helps!

Have a nice day! ♥

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Answer:

1.63% probability that the 10 selected include include all the best 5 engineers in the group of 20

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The order in which the engineers are selected is not important, so the combinations formula is used to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Desired outcomes:

10 engineers selected from a set of 20.

5 best, from a set of 5.

Other 5, from a set of 20-5 = 15.

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Totao outcomes:

10 engineers selected from a set of 20.

T = C_{20,10} = \frac{20!}{10!(20-10)!} = 184756

Probability:

p = \frac{D}{T} = \frac{3003}{184756} = 0.0163

1.63% probability that the 10 selected include include all the best 5 engineers in the group of 20

5 0
3 years ago
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7 0
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Step-by-step explanation:

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