Complete Question
A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackthorn wand has a price of 45.20. What proportion of wand prices are lower than the price of the blackthorn wand? You may round your answer to four decimal places
Answer:
0.1151
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score = $45.20
μ is the population mean = $50
σ is the population standard deviation = $4
We are solving for x < 45.20
Hence:
z = 45.20 - 50/4
z = -1.2
Probability value from Z-Table:
P(x<45.20) = 0.11507
Approximately to 4 decimal places = 0.1151
Therefore, the proportion of wand prices that are lower than the price of the blackthorn wand is 0.1151
Answer:
Distributive
Step-by-step explanation:
In any problem with a form of A(b+c) you are distributing the A to both b and c
As you can see in your example, you are distributing the 7 to both the 8 and the two
If you were to solve this problem the final answer would be 70
The property is Distributive
Answer:
2/5
Step-by-step explanation:
1. 1/2 * 4/5
2. 4/10
3. reduce/divide the fraction by 2
4. you get 2/5