A) Since you need the probability of the person being a freshman and a C grade student, the probability will be 8/45 (number of C grade student who are freshmen divided by the total number of people)
b) You have to add the two probabilities that you are going to find whenever you see an 'or' function.
Student is a sophomore = 22/45
Student made an A = 7/45
Probability = 22/45 + 7/45
= 29/45
c) Whenever you see an 'and' function, you have to multiply up the probability.
Student is a sophomore = 22/45
Student made an A = 7/45
Probability = 22/45 * 7/45
= 154/2025
d) Student made a D = 5/45
Student is a freshman = 23/45
Probability = 5/45 + 23/45
= 28/45
Hopefully, this made sense.
Answer:
2.28 and 0.22
Step-by-step explanation:
2x²+1=5x
2x²-5x+1=0
this cannot be properly factorized
so let's use the almighty formula,
where a=2, b=-5, c= 1
=-(-5)±√{(-5)²-4x2x1} x 1/(2 x 2)
=5±√25-8 x1/4
=5±√17 x ¼
=(5±4.12)/4
=2.28. or. 0.22
roots=2.28 and 0.22
Step-by-step explanation:
the Pythagorean Theorem only works with right triangles. You can use the Pythagorean Theorem to find the length of the hypotenuse of a right triangle if you know the length of the triangle's other two sides, called the legs.
Assuming
, and not
(which is easier to work with, but not by much).
Answer:
Step-by-step explanation:
B = 2×10⁸
A = 3×10⁸