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Sphinxa [80]
3 years ago
7

Brainliest to best answer.

Mathematics
1 answer:
ohaa [14]3 years ago
3 0
1) 15/15 which is 1
2)100/30 which is 3 1/3
3)8.2
4) too long sorry
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The National Center for Health Statistics (NCHS) reports that 70%70% of U.S. adults aged 6565 and over have ever received a pneu
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11.44% probability that exactly 12 members of the sample received a pneumococcal vaccination.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they received a pneumococcal vaccination, or they did not. The probability of an adult receiving a pneumococcal vaccination is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

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

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This means that p = 0.7

20 adults

This means that n = 20

Determine the probability that exactly 12 members of the sample received a pneumococcal vaccination.

This is P(X = 12).

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11.44% probability that exactly 12 members of the sample received a pneumococcal vaccination.

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Which ordered pairs are solutions to the inequality 2y−x≤−6 ?
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If you substitute each ordered pair for x and y the only ordered pair that works is (0,-3) .

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Read 2 more answers
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