Answer:
The probability that a randomly selected student has a score between 350 and 550 = 0.5867
Step-by-step explanation:
Mean = 500
Standard deviation = 110
Let X be the score of student in a standardized test
The probability that a randomly selected student has a score between 350 and 550 =
=
= Putting
= 0.6736 - .0869 ( Using Z table )
= 0.5867
y=1.09x
70 percent
7i sqrt(2)
sqrt(-98)
We know that sqrt( ab) = sqrt(a) sqrt(b)
sqrt(-1) sqrt(98)
The sqrt (-1) = i
i sqrt(98)
i sqrt(49) sqrt(2)
i*7* sqrt(2)