Answer:
a)
b)
Step-by-step explanation:
Previous concepts
The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.
The variance of a random variable X represent the spread of the possible values of the variable. The variance of X is written as Var(X).
Solution to the problem
For this case we have defined the following random variable Y="number of moving violations for which the individual was cited during the last 3 years. "
And we have the distribution for Y given:
y 0 1 2 3
P(y) 0.6 0.2 0.15 0.15
Part a
For this case the expected value is given by:
And if we replace the values given we have:
Part b
For this case we have defined a new random variable representing a subcharge, and we want to find the expected amount for this random variable, using properties of expected value we have:
And we can find on this way:
And if we replace the values given we have:
And then replacing we got:
Step-by-step explanation:
I hope I'm correct. I've never learnt differentiation for log and exponents before
Answer:
length x width = area
14 x 11 = 154
154 / 22 = 7 fertilizer needed
Hope this helps
Step-by-step explanation:
Answer: 7 11/19 (fraction)
Step-by-step explanation:
Answer:
a and e
Step-by-step explanation: