The answer is B.
remember to use the reciprocal when dividing with fractions
Answer:
option A
Step-by-step explanation:
given,
10% A grades 80% B grades 10% C grades
This year, managers with scores less than 35 received C's and those with scores above 425 received A's.
The mean has to be middle of two corresponding cutoff value
![\mu = \dfrac{35+425}{2}](https://tex.z-dn.net/?f=%5Cmu%20%3D%20%5Cdfrac%7B35%2B425%7D%7B2%7D)
μ = 230
Cutoff Off C grade corresponds with the area of 0.10 is table A.
corresponding z- score according to Table A
Z = -1.28
now, standard deviation
![z = \dfrac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z%20%3D%20%5Cdfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
![\sigma= \dfrac{x-\mu}{z}](https://tex.z-dn.net/?f=%5Csigma%3D%20%5Cdfrac%7Bx-%5Cmu%7D%7Bz%7D)
![\sigma= \dfrac{35-230}{-1.28}](https://tex.z-dn.net/?f=%5Csigma%3D%20%5Cdfrac%7B35-230%7D%7B-1.28%7D)
σ = 152.3
Correct answer is option A
Answer:
bcdf
Step-by-step explanation:
here ya go
Math is really important in life. it can help you with your jobs. it also helps you at school. it also helps you with figuring out the perimeter of your house.