Dan's age is x.
Jack is three years older than Dan, so his age is x+3.
Harold is twice as old as Jack, so his age is 2(x+3).
Harold's age is five times Dan's age.
Jack is 5 years old.
Answer: 0.9738
Step-by-step explanation:
We assume that the scores follows a normal distribution.
Let 
denotes the class average .
As per given we have,
Sample size : n= 12
The probability that a class of 15 students will have a class average greater than 70 on Professor Elderman’s final exam will be :
Hence, the correct answer = 0.9738
B
my way of answer this is just have to have per because you're dealing with unit rates :)
Well to make this easier convert the 81% into a decimal also which is 0.81 so the answer would be .81 * .163 and that equals 0.132
