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3 years ago

Suppose you have 7 dark chocolates and 9 light chocolates in a box.

1 answer:

4 0

To be sure of 2 light chocolates, 9 would need to be chosen as you would first need to eliminate the 7 dark chocolates and then pick the extra 2 light ones. For the 2 dark, 11 would bee needed as, again, the 9 lights would need to be eliminated and the other 2 dark accounted for.

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Grouping 12x3 – 9x2 + 4x - 3?

ololo11 [35]

$12x^{3} - {9x}^{2} + 4x - 3 = \\ = 3 {x}^{2} (4x - 3) + 1(4x - 3) = \\ = (4x - 3)( {3x}^{2} + 1)$

3 0

3 years ago

Read 2 more answers

The creators David Benioff and D. B. Weiss of the TV show "Game of Thrones", want to know how popular Season 8 was among the sho

hram777 [196]

Answer:

The lower bound for a 90% confidence interval is 0.2033

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 40361, \pi = \frac{8337}{40361} = 0.2066$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2066 - 1.645\sqrt{\frac{0.2066*0.7934}{40361}} = 0.2033$

The lower bound for a 90% confidence interval is 0.2033

3 0

3 years ago

33. The students of Class VIII of a school donated Rs 2401 in all, for Prime Minister's National

DaniilM [7]

Answer:

Step-by-step explanation:

Let there be x students in the class.

Since, donation by each student is equal to the number of students in the class.

So,

Total donations = 2401

$x \times x = 2401 \\ \\ {x}^{2} = 2401 \\ \\ x = \pm \sqrt{2401} \\ \\ \pm \: 49 \\ \\ \because \: x \: can \: not \: be \: - ve. \\ \\ \therefore \: x = 49$

Thus, the number of students in the class = 49

7 0

3 years ago

What is the equation for the line

Darya [45]

That depends the line
1, If the line is not parallel to Oy, so its equation is y=ax+b
2, Or its equation is x=m

8 0

4 years ago

2 • (3 • 7) and (2 • 3) • 7 = ?

shusha [124]

Answer:

First one is 42 and the second one is 48.

Step-by-step explanation:

Start with parentheses. I'll use the first one as an example. 3 x 7 is 21. Now that the parentheses are done, multiply it by whatever's left. 21 x 2, that's 42. For the other one, 2 x 3 is 6, x 7, is 48. Have a good day :)

8 0

3 years ago

Read 2 more answers