The average score on a standardized test is 750 points with a standard deviation of 50 points. What is the probability that a student scored more than 850 on the standardized test ?
Solution 1
z=(x-μ)/σ
where:
x=850
μ=750
σ=50
thus
z=(850-750)/50
z=2
thus
P(x>850)=1-P(x<850)=1-P(z<2)=1-0.9772=0.0228
Answer: P(x>850)=0.0228
Solution 2
Answer:
2%
Step-by-step explanation:
📚 Related Questions
Answer:
The answer is Ratio
Step-by-step explanation:
From what I know, the dimensions of the larger rectangle can be found from length x width = 250 square centimetres.
Any multiplication problem that equals 250 could work out for length x width.
We rewrite 45 as 3²×5
thus
√45=√(3²×5)
pulling terms out from under the radical we obtain
3√5
thus the exact answer form is:
3√5
or the decimal form is:
6.70820393
The effective interest rate, also known as the effective annual interest rate, annual equivalent rate, or simply effective rate. The card which offers a better deal to the customer is Credit card A.
What is an effective rate of interest?
The effective interest rate, also known as the effective annual interest rate, annual equivalent rate, or simply effective rate, is the interest rate on a loan or financial product that is restated from the nominal interest rate and expressed as the equivalent interest rate if compound interest was payable annually in arrears. It is calculated by the formula,
EIR = [1+(i/n)]ⁿ - 1
The effective rate of interest on Credit Card A is,
Effective rate = [1+(i/n)]ⁿ - 1 = [1+(0.2729/12)]¹² - 1 = 30.97%
The effective rate of interest on Credit Card B is,
Effective rate = [1+(i/n)]ⁿ - 1 = [1+(0.2712/365)]³⁶⁵ - 1 = 31.14%
Since the effective rate of Credit card A is less than credit card B, therefore, the card which offers a better deal to the customer is Credit card A.
Learn more about Effective Interest Rates:
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Rule of three:
Pasta People
(kilograms)
0.48 → 4
x ← 14
x=(14 * 0.48)/4
x=1.68
Answer: She will need 1.68 kilograms of pasta for 14 people
Answer:
1.68 kilo grams are required for 14 people.
Step-by-step explanation:
First of all the answer is required in kilo grams and the data given is in grams.
Lets convert the given value to kilo grams;
480 grams = 0.48 kilo grams
If 0.48 kilo grams are required to cater 4 people then how many kilo grams are required to cater 14 people?
⇒ kilo grams
1.68 kilo grams.