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3 years ago

What is the value of -2-(-16)

Mathematics

1 answer:

Lynna [10]3 years ago

5 0

Answer:

-2-(-16)=14

Step-by-step explanation:

Use KCC rule

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A probability distribution for a random variable Y is given by P(Y=y)=cy, for y=1,2,4,5 and c is a constant. Find E(Y), the expe

Dahasolnce [82]

Answer:

$c(1+2+4+5) =1$

$c =\frac{1}{12}$

Now we can find the expected value with this formula:

$E(Y) =\sum_{i=1}^n Y_i P(Y_i) =\sum_{i=1}^n cy_i *y_i = cy^2_i$

And replacing we got:

$E(Y) = \frac{1}{12} (1^2 + 2^2 + 4^2 +5^2) = \frac{46}{12}= \frac{23}{6}$

Step-by-step explanation:

For this case we know the following probability mass function given:

$P(y) = cy , y= 1,2,4,5$

For this case we need to satisfy the following condition in order to have a probability distribution function:

$\sum_{i=1}^n P(y_i) =1$

And we have this:

$c(1+2+4+5) =1$

$c =\frac{1}{12}$

Now we can find the expected value with this formula:

$E(Y) =\sum_{i=1}^n Y_i P(Y_i) =\sum_{i=1}^n cy_i *y_i = cy^2_i$

And replacing we got:

$E(Y) = \frac{1}{12} (1^2 + 2^2 + 4^2 +5^2) = \frac{46}{12}= \frac{23}{6}$

6 0

3 years ago

The formula sa

sergeinik [125]

Answer:

The correct option is (b).

Step-by-step explanation:

The formula for the side of a cube of surface area SA is as follows :

$s=\sqrt{\dfrac{SA}{6}}$

When SA = 180 m²

$s=\sqrt{\dfrac{180}{6}}\\\\s=\sqrt{30}$

When SA = 120 m²

$s=\sqrt{\dfrac{120}{6}}\\\\s=\sqrt{20}\\\\=2\sqrt5$

Difference,

$=30-2\sqrt5$

So, the correct option is (b).

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3 years ago

A triangle has sides with links of 5 miles 10 miles in 13 miles is it a right triangle?

IRISSAK [1]

Answer: The Socratic App

Step-by-step explanation: The Socratic app can help you solve your problem.

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4 years ago

Ali is quite the baseball player. Forty two percent of her hits are home runs if Ali hit 150 balls last season how many of those

ra1l [238]

63 hits were home runs

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4 years ago

PLZ HELP QUICK<br> Which value from the set {12, 16, 21, 36} makes 2/3-n=19 true?

lilavasa [31]

Answer: 36

Step-by-step explanation: when you solve the problem 2/3n-5=19 you get 36.

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3 years ago

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