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LUCKY_DIMON [66]
3 years ago
14

Hannah has 6 orange sweets and some yellow sweets. Overall, she has n sweets. The probability of her taking 2 orange sweets is 1

/3. Prove that: n^2-n-90=0
Mathematics
1 answer:
Alex_Xolod [135]3 years ago
8 0
The probability of her taking first orange sweet is 6/n. The probability of her taking second orange sweet is 5/(n-1). So the probability of taking 2 orange sweets is (6/n)*[5/(n-1)]=1/3. Deformation this equation, we can get that n^2-n-90=0.
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Match each word to its definition.
Citrus2011 [14]

Answer:

1. biased sample: sample not representative of the entire population

2.convenience sample: sample where representatives are easily accessible

3.unbiased sample: sample where every member of the population has an equal chance

4. self-selected sample: sample where members volunteer to take part

5. stratified sample: members are selected from the different subgroups within a population

6. systematic sample: sample members are selected through the use of a rule.

Hope this helps!!

7 0
2 years ago
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A contractor is considering a sale that promises a profit of 26,000 with a probability of 0.7 or a loss (due to bad weather stri
Lady bird [3.3K]

Answer:

A

Step-by-step explanation:

The expected profit would be the sum of all the possibility multiplied. It means,

<em>"We need to multiply the profit by its possibility and add it with the product of the loss and its possibility."</em>

<em />

This will be the expectation, or expected profit.

Let's do it:

Expected Profit = (26,000)(0.7) + (-8000)(0.3) = 15,800

The correct answer is A

7 0
3 years ago
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What is the volume of a sphere with 5 foot diameter
MatroZZZ [7]
523.6 is the answer hope this helps!
6 0
2 years ago
fluorescent powder comes in 20 G vials with 12 vials in a set, each vilal a different color. so if I order 3 sets I will have 3
Anna007 [38]

First you need to know how many cups of powder you are going to need for the 496 cups of paint you already have

\begin{gathered} 1\text{ CUP POWDER}\Rightarrow5\text{ CUP PAINT} \\ x\text{ CUP POWDER}\Rightarrow496\text{ CUP PAINT} \end{gathered}

We write this as a ratio

\begin{gathered} \frac{x}{496}=\frac{1}{5} \\ x=\frac{496}{5} \\ x=99.2 \end{gathered}

for the 496 cups of paint you will need 99.2 cups of powder.

Continue by seeing how may grams there are in 99.2 cups

\begin{gathered} 60g\Rightarrow0.2536\text{ CUPS POWDER} \\ x\Rightarrow99.2\text{ CUPS POWDER} \end{gathered}

write it as a ratio and solve for x again.

\begin{gathered} \frac{x}{99.2}=\frac{60}{0.2536} \\ x=23470.03155 \end{gathered}

now find how many vials you will need

\begin{gathered} 1\text{vial}\Rightarrow20g \\ x\Rightarrow23470.03155g \end{gathered}

write the ratio and solve

\begin{gathered} \frac{x}{23470.03155}=\frac{1}{20} \\ x=\frac{23470.03155}{20} \\ x=1173.5\approx1174 \end{gathered}

If each sets comes with 12 sets, write the ratio and find the number of sets you will need

\begin{gathered} 1\text{set}\Rightarrow12vials \\ \text{xsets}\Rightarrow1174vials \end{gathered}\begin{gathered} \frac{x}{1174}=\frac{1}{12} \\ x=\frac{1174}{12} \\ x=97.83\approx98 \end{gathered}

you will need 98 sets for this amount of paint.

7 0
1 year ago
7w+8p for w= 4 and p=5
stiks02 [169]
Plug it in

7(4) + 8(5) which would be 28 + 40

Answer: 68
7 0
3 years ago
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