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BartSMP [9]
3 years ago
12

Which of the following scenarios represents a combination? The number of ways 30 people can finish in the first 3 positions. The

number of possible pizzas that can be made with 12 possible toppings. The number of ways 15 people can line up in a row. The number of ways letter can be pulled from the tiles in a scrabble board.
Mathematics
2 answers:
Elan Coil [88]3 years ago
7 0
<h2>Answer:</h2>

The scenarios that represents a combination is:

<em>The number of possible pizzas that can be made with 12 possible toppings.</em>

<h2>Step-by-step explanation:</h2>

<u>Combination--</u>

Combination refers to the selection or ways of choosing 'n' items.

                             whereas

<u>Permutation--</u>

Permutation refers to the selection as well as arrangement of n items.

1)

The number of ways 30 people can finish in the first 3 positions.

In this situation we need to use permutation.

Since firstly we have to choose  three people out of 30 who attained the top three positions and then we have to arrange them according to there ranks.\

2)

The number of possible pizzas that can be made with 12 possible toppings.

This situation will involve combination.

Because the toppings may be any random way we have to just choose the different number of toppings we require for pizza.

3)

The number of ways 15 people can line up in a row.

In this scenario we need to use permutation.

Because we have to arrange 15 people in a line.

4)

The number of ways letter can be pulled from the tiles in a scrabble board.

In this situation we'll use permutation.

Since we are asked to choose the letters from the board also the order in which the letters are chosen will vary.

lyudmila [28]3 years ago
5 0

Answer:

B. The number of possible pizzas that can be made with 12 possible toppings.


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PLEASE HELP ME<br> Which expression is equivalent to –8(–5k+4)+6k
zheka24 [161]

Answer:

the last option (-5k+4)-8 + 6k

Step-by-step explanation:

-8(-5k+4)+6k

to simplify, begin by distributing the -8 so that parentheses are removed:

=(-8)(-5k) + (-8)(4) + 6k

=40k - 32 + 6k

combine 'like terms':

46k-32

the only answer which simplifies to 46k-32 is the last option:

the only difference between the original problem and the last option is that the -8 value is behind the parentheses instead of in front of it; it simplifies to be 46k-32

6 0
2 years ago
If sin 0 = 4<br> what is cos O?<br> cos 0 =<br> =<br> Simplify your answer if possible.
Tems11 [23]

Answer:

  cos(θ) = (√33)/7

Step-by-step explanation:

The relevant relation is ...

  cos(θ) = √(1 -sin²(θ))

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7 0
2 years ago
2. Simplify (27) 2/3 x (125) 1/3​
baherus [9]
Hopes this helps:

Answer: 750
8 0
2 years ago
Read 2 more answers
Use a normal approximation to find the probability of the indicated number of voters. In this case, assume that 104 eligible vot
crimeas [40]

Answer:

The probability that exactly 27 of 104 eligible voters voted is​ 0.057 = 5.7%.

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this case, assume that 104 eligible voters aged 18-24 are randomly selected.

This means that n = 104.

Suppose a previous study showed that among eligible voters aged 18-24, 22% of them voted.

This means that p = 0.22

Mean and standard deviation:

\mu = 104*0.22 = 22.88

\sigma = \sqrt{104*0.22*0.78} = 4.2245

Probability that exactly 27 voted

By continuity continuity, 27 consists of values between 26.5 and 27.5, which means that this probability is the p-value of Z when X = 27.5 subtracted by the p-value of Z when X = 26.5.

X = 27.5

Z = \frac{X - \mu}{\sigma}

Z = \frac{27.5 - 22.88}{4.2245}

Z = 1.09

Z = 1.09 has a p-value of 0.8621

X = 26.5

Z = \frac{X - \mu}{\sigma}

Z = \frac{26.5 - 22.88}{4.2245}

Z = 0.86

Z = 0.86 has a p-value of 0.8051

0.8621 - 0.8051 = 0.057

The probability that exactly 27 of 104 eligible voters voted is​ 0.057 = 5.7%.

5 0
3 years ago
Writing in math use counters.tell how to make 10 when adding 8 5
kaheart [24]
<span>How can you make 10 when adding 8 + 5?
Well, let’s try:
Adding 8 and 5 is equals to 13
=> 8+5=13 (How can you get 10)
Well 13 has 2 digits where 3 is placed in ones and 1 is place in tens. Therefore adding 8 and 5 will result to 10.

</span>



5 0
3 years ago
Read 2 more answers
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