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
Answer:
20×4=80
4×2×10=80
Step-by-step explanation:
To estimate the result of multiplication (product), round the numbers to some close numbers that you can easily multiply mentally.
One method of estimation is to round all factors to the biggest digit (place value) they have.
you need to round 24 to the nearest ten which is 20 and leave 4 as it is
Answer:
9
Step-by-step explanation:
Answer:
(x-6) (x-6) or (x-6)^2
Step-by-step explanation:
1.) Find factors of 36 that add up to 12
2.) 6 which makes this a perfect square
3.) you know to subtract because the middle term is negative and the third term is positive (two negatives make a positive)
Answer:
4,641
Step-by-step explanation: