1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sashaice [31]
2 years ago
12

Given that on one section of the sat the mean is 500 and the standard deviation is 100, what is the approximate probability of a

student scoring 400 or lower or 500 or higher on the test?
Mathematics
1 answer:
Arada [10]2 years ago
7 0

We are to find for the probability when X≤400 or X≥500

We use the z score formula: z = (x – u) / s

 

when X≤400, the z is:

z = (400 – 500) / 100 = - 1

 

when X≥500, the z is:

z = (500 – 500) / 100 = 0

 

SO from the standard probability tables, the probability at:

<span>P (z ≤ -1 or z ≥ 0) = 0.6587</span>

You might be interested in
The graph of a linear function passes through the point (2,5) and a slope of 3
Delicious77 [7]

Answer:

y=3x-1

Step-by-step explanation:

The point slope form of a line is (y-y_1)=m(x-x_1) where x_1=2\\y_1=5. We write  

(y-5)=3(x-2)

Convert point slope form to slope intercept form by simplifying and rearranging.

y-5=3(x-2)\\y-5=3x-6\\y=3x-1


8 0
3 years ago
Caroline rolls a fair dice 480 times. How many times would Caroline expect to roll a six?
Gnom [1K]
A fair die has 6 sides so a 1/6 chance for each number
So divide 480/6= 80
80 times for each number, 80 for 6
8 0
3 years ago
Calculate the number of ways to form a set of three distinct items such that no two of the selected items are in the same row or
Eddi Din [679]

Answer:

1200

Explanation:

Order does not matter, if we said xyz order, it would still not make a difference if it was zyx or yzx hence we use the combination formula:

nCr = n! / r! * (n - r)!

where n= total number of items

r= number of items chosen at a time

Combinations are used when the order of events do not matter in calculating the outcome.

We calculate using the formula:

(30×20×12)÷3!=1200

There are therefore 1200 ways for the three distinct items to not be in same row or column

8 0
3 years ago
How many kilometers are there ??
irinina [24]

Answer:

20

Step-by-step explanation:

1 hour=2 kg

10 hrs=10×2=20

Mark as brainliest please!

5 0
3 years ago
Evaluate each expression if =3/4, = 8, = −2 and = 0.4.<br> −| x^3+2y^4 |
MakcuM [25]

Answer:

x^-13

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Help!!! Pls!!!! :) i dont know
    15·1 answer
  • Tina collects 487 seashells and Wayne collects 345. After giving 40 seashells to Calvin, they put the remainder equally into 36
    13·1 answer
  • A sixth grader weighs 90 pounds, which is 120% of what he weighed in fourth grade. How much did he weigh in fourth grade?
    11·1 answer
  • Please help me with number 4, thank you
    6·2 answers
  • PLEASE HELP!!!!! thank you :)
    12·2 answers
  • Please help! Don’t have the height to find the area of this trapezoid,
    14·1 answer
  • Mr. Brooks has $14.20 in his checking account, he uses
    11·1 answer
  • Whats this one? plsssssssss
    9·1 answer
  • Answer asap thank you ?!!!??!
    7·2 answers
  • Someone plssssssss help me with thisss
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!