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3 years ago

Why is drawing a number greater than 6 likely?

Mathematics

1 answer:

anastassius [24]3 years ago

6 0

Answer:

This is likely, because you have more than one dice right. So even if you role a 2 on one but you have two dice so when you think of a dice you think 1-3 is considered low but you have 2/3 a chance of getting a number greater than 6.

Step-by-step explanation:

Short notice answer I', taking a test hope this helps a little.

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74% of freshmen entering public high schools in 2006 graduated with their class in 2010. A random sample of 81 freshmen is selec

Assoli18 [71]

Answer: Probability that the proportion of students who graduated is greater than 0.743 is P = 0.4755

Step-by-step explanation:

Given that,

Probability of freshmen entering public high schools in 2006 graduated with their class in 2010, p = 0.74

Random sample of freshman, n = 81

Utilizing central limit theorem,

$P(\hat{p}$

So,

$(P(\hat{p}>0.743) = P(Z>0.743 - \frac{0.74}{\sqrt{\frac{0.74(1-0.74)}{81} } } )$

= P( Z > 0.0616)

= 0.4755 ⇒ probability that the proportion of students who graduated is greater than 0.743.

7 0

3 years ago

Three friends pay $26.25 to see a movie how much did each ticket cost

Leokris [45]

Each ticket is 26.25, but since three friends are going, all you have to do is:

26.25 x 3

Which is $78.75

4 0

3 years ago

Read 2 more answers

For the matrices below. Find all (real) eigenvalues. A= [7 9] [0 9]

Jet001 [13]

Answer:

The answer is "9 and 7".

Step-by-step explanation:

Given:

$A=\left[\begin{array}{cc}7&9\\0&9\end{array}\right]$

Using formula:

$|A-\lambda \cdot I|= 0\\\\$

$\to |\left[\begin{array}{cc}7&9\\0&9\end{array}\right]-\lambda \left[\begin{array}{cc}1&0\\0&1\end{array}\right] |=0\\\\\\ \to |\left[\begin{array}{cc}7&9\\0&9\end{array}\right]- \left[\begin{array}{cc}\lambda&0\\0&\lambda\end{array}\right] |=0\\\\\\\to|\left[\begin{array}{cc}7-\lambda &9\\0&9-\lambda\end{array}\right]|=0\\\\\\\to|(7-\lambda)(9-\lambda)|=0\\\\\to (7-\lambda)(9-\lambda)=0\\\\\to 7-\lambda=0 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 9-\lambda=0\\\\$

$\to \lambda=7 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \lambda=9\\\\$

8 0

4 years ago

For what values of a does the equation

mihalych1998 [28]

Answer:

The value of a which equation have 2 , - $\frac{7}{4}$

Step-by-step explanation:

Given expression as :

2 a - 4 x = 4 - a² × x

The equation lies in the interval ( - 8 , - 2 )

∵ equation lies in the interval , so it must satisfy the equation

So , 2 a - 4 × ( - 8 ) = 4 - a² × ( - 8 )

Or, 2 a + 32 = 4 + 8 a²

Or, a + 16 = 2 + 4 a²

So, equation can be written as :

4 a² - a - 14 = 0

Or, 4 a² - 8 a + 7 a - 14 = 0

Or, 4 a ( a - 2 ) + 7 ( a - 2 ) = 0

Or, ( a - 2 ) ( 4 a + 7 ) = 0

∴ a = 2 And - $\frac{7}{4}$

Hence The value of a which equation have 2 , - $\frac{7}{4}$ Answer

8 0

3 years ago

An inlet pipe on a swimming pool can be used to fill the pool in 30 hours. The drain pipe can be used to empty the pool in 34 ho

antoniya [11.8K]

Answer:

204 hours

Step-by-step explanation:

The filling speed is 30 hours or:

1/30 in an hour

The draining speed is 34 hours or:

1/34 in an hour

If both lines are open simultaneously, the filling speed is:

1/30 - 1/34 =
17/510 - 15/ 510 =
2/510 =
1/255 in an hour

If the tank is 1/5 full, then we need to fill the 4/5 of level and it will take:

4/5 : 1/255 =
4/5 *255 =
204 hours

8 0

2 years ago