Answer:
A
Step-by-step explanation:
- 1/5 of 5x is -1 or just -x and -1/5 of 20 is -4. Then the other one is-1/4 of 4 is -x and -1/4 of -28 is 7. Now combine like terms so -x + -x is -2x and 7+ -4 or 7-4 is 3
S*x!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
yesss!!!!
Step-by-step explanation:
<span>3 times the sum of b and f can also be written as </span>
With 10 integers available,

has PMF

We're interested in the statistics of the new random variable

. To do this, we need to know the PMF for

. This isn't too hard to find.

Since the PMF for

gives a value of

whenever

is an integer between 0 and 9, it follows that

must also be an integer for the PMF to give the identical value of

. This means

Now the mean (expectation) is


The variance would be




The standard deviation is the square root of the variance, so you have