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3 years ago

If 6 people out of 30 people are sick, how many would you predict to be sick out of 120 people?

Mathematics

2 answers:

ipn [44]3 years ago

7 0

Answer:

24 people

Step-by-step explanation:

6 to 30 ratio is 20% so if you do 20% of 120 it is 24

Yanka [14]3 years ago

7 0

Answer:

24 people would be sick

Step-by-step explanation:

6-30

12-60

18-90

24-120

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Answer:

Step-by-step explanation:

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Read 2 more answers

If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

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Step-by-step explanation:

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