Step-by-step explanation:
Given:
When , then,
Cancelling 3 on RHS, we get,
Hence,
Answer:
B. .007
Step-by-step explanation:
Mean=μ=23500
Standard deviation=σ=7200
For sample of 50 students
Mean=μxbar=μx=23500
Standard deviation=σxbar=σ/√n=7200/√50=1018.23
So, the probability that mean outstanding loan for students is under $21000
P(xbar<21000)=P((xbar-μxbar)/σxbar<(21000-23500)/1018.23)=P(Z<-2.455)
P(xbar<21000)=P(Z<-2.455)
P(xbar<21000)=P(-∞<z<0)-P(0<z<-2.455)
P(xbar<21000)=0.5-0.4930=0.007
Thus, the probability that mean outstanding loan for students is under $21000 is 0.007.
Answer:
Susan's measurements areincorrect. the measurements for sugar is 1 cup and for flour its 3 1/2 cups.
Step-by-step explanation:
(i dont know how to best answer section b but ill do my best)
A) 1/2 cups of sugar X2= 1 cup of sugar
1 3/4 cups of sugar X2= 3 1/2 cups of flour
B) When you have a mixed number like 1 and 3/4 cups like the example above, you are able to convert it into an improper fraction by multiplying the denominator withthe whole number and then addingthe remaining from the numerator. So with 1 3/4 cups:
4X1= 4+3= 7
So now you get 7/4 cups. to turn it back into a mixed number, just reverse the process.