Answer:
46
Step-by-step explanation:
10%*X=20
X=20/(10%)
X=20/0.1
X=200
23%*200=46
The absolute value of 78 is < the absolute value of -222
Answer: 0.6827
Step-by-step explanation:
Given : Mean IQ score : 
Standard deviation : 
We assume that adults have IQ scores that are normally distributed .
Let x be the random variable that represents the IQ score of adults .
z-score : 
For x= 90

For x= 120

By using the standard normal distribution table , we have
The p-value : 

Hence, the probability that a randomly selected adult has an IQ between 90 and 120 =0.6827
Answer:
Step-by-step explanation:
I HAVE NO IDEA...SRRY