Answer:
E and G
Step-by-step explanation:
Multiply 42.50 by 3.5 then add 60.00 to your answer
Answer:
81.86%
Step-by-step explanation:
We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.
First of all we will find z-score using z-score formula.
Now let us find z-score for 86.
Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.
Using normal distribution table we will get,

We will use formula
to find the probability to find that a normal variable lies between two values.
Upon substituting our given values in above formula we will get,


Upon converting 0.81859 to percentage we will get

Therefore, 81.86% of final exam score will be between 68 and 86.
Commutative Property is a type of swapping property, you switch the numbers and get the same answer. This only works on addition and multiplication (+,x) Here are some example to show you:
3*6=18 = 6*3=18 and 3+6=9 = 6+3=9