Answer:
A, C are true . B is not true.
Step-by-step explanation:
Mean of a discrete random variable can be interpreted as the average outcome if the experiment is repeated many times. Expected value or average of the distribution is analogous to mean of the distribution.
The mean can be found using summation from nothing to nothing x times Upper P (x) , i.e ∑x•P(x).
Example : If two outcomes 100 & 50 occur with probabilities 0.5 each. Expected value (Average) (Mean) : ∑x•P(x) = (0.5)(100) + (0.5)(50) = 50 + 25 = 75
The mean may not be a possible value of the random variable.
Example : Mean of possible no.s on a die = ( 1 + 2 + 3 + 4 + 5 + 6 ) / 6 = 21/6 = 3.5, which is not a possible value of the random variable 'no. on a die'
Method 1.
Use the formula of a distance between two points:
We have
substitute
Answer: 10
Method 2
Look at the picture.
Use the Pythagorean theorem:
Answer: 10
Answer:
3 3/4 cups of coca powder
Step-by-step explanation:
60 brownies
12 brownies for 3/4 cup of cocoa powder
60/12=5
5(3/4)= 15/4
15/4= 3 3/4 cup of coca powder
Answer:
x = 
Step-by-step explanation:
Given expression is,
x =
