Solution: We are given:
Total students = 10 + 30 + 10 =50
Number of students who received A grade = 3 + 10 + 5 = 18
Number of senior student's who received A grade is = 10
Let A be the event that the student is senior and B be the event that he or she earned an A. Then,
Now the probability a student chosen at random from this class and is found to have earned an A, the probability that he or she is a senior is:
Answer:
Alright well solve for the variable in one of the equation's. then substitute the result of the other equation
Point form: - 175/51, 1/51
Equation form:
x = - 175/51 y = 1/51 Hope this help's :)
Step-by-step explanation:
Answer:
We can use the z score formula given by:
And replacing we got:
And using the normal standard distribution and the complement rule we got:
Step-by-step explanation:
For this case w eknow the following parameters:
represent the mean
represent the deviation
n= 32 represent the sample sze selected
We want to find the following probability:
We can use the z score formula given by:
And replacing we got:
And using the normal standard distribution and the complement rule we got:
Dimensions of the room------------------- >16*13
1 in---------------- >0.0833333 foot
3 in----------------- >x
x=3*.0833333=0.25 ft
Let
<span>C-------------- > dimensions of the piece of carpet that Charlotte must purchase
C-------------- > (16+2*0.25)*(13+2*0.25)---------- > (16.50)*(13.50)=222.75 ft</span>²
<span>
The answer a the question 1) is 16.50 feet X 13.50 feet</span>
The answer a the question 2) is 222.75 ft²
<span>3. How many hours should it take for the four-person crew to lay the flooring in Charlotte's bedroom?
if </span><span>two-person carpet crew can lay 50 square feet of carpet---------- > 1 hour</span><span>
four person </span>carpet crew can lay 100 square feet of carpet---------- > 1 hour
therefore
if 100 ft² carpet----------------------- > 1 hour
222.75 ft² carpet--------------------- > x
x=222.75/100=2.2275 hours=2.23 hours
The answer is 2.23 hours
Answer:
9
Step-by-step explanation:
