Answer:
a.
Mean of given distribution=1.95
Standard deviation of given distribution=0.865
Step-by-step explanation:
a.
Mean of given distribution= E(x)=∑[x*P(x)]
Mean of given distribution=0*0.05+1*0.25+2*0.4+3*0.3
Mean of given distribution=0+0.25+0.8+0.9
Mean of given distribution=1.95
Standard deviation of given distribution=σx=√[ E(x²)-(E(x))²]
E(x²)=∑x²p(x)=0²*0.05+1²*0.25+2²*0.4+3²0.3
E(x²)=0+0.25+1.6+2.7
E(x²)=4.55
Standard deviation of given distribution=√[4.55-(1.95)²]
Standard deviation of given distribution=√[4.55-3.803]
Standard deviation of given distribution=√0.748
Standard deviation of given distribution=0.865
Answer:
The number of gallons of gas Karl used is 15 gallons.
Option (C) is correct.
Step-by-step explanation:
As given
Karl drove 617.3 miles.
For each gallon of gas, the car can travel 41 miles.
i.e
1 gallons = 41 miles
Now find out for the 617.3 miles.
Thus
Therefore the number of gallons of gas Karl used is 15 gallons.
Option (C) is correct.
Answer:
Point D
Step-by-step explanation:
First set it up so that -x-5=1
Then solve for X
-x=6
Divide by negative 1 since we cannot have a negative x
x=6
You have to multiplying first, then adding on 6 over negative 3 as a fraction. The parentheses it will be multiplying.
(4)(9)+6/-3
= 34.
It will help you.
Have a great day!
-Charlie