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
inessss [21]
2 years ago
7

The mean of the following frequency distribution is 25.2. Find the missing frequency x.

Mathematics
1 answer:
sattari [20]2 years ago
4 0

Answer:

Solution:-

Frequency Distribution     Frequency     Mid values     F*M

0 - 10                                    8                     5                40

10 - 20                                  x                    15               15x

20 - 30                                 10                   25               250

30 - 40                                 11                   35               385

40 - 50                                  9                    45               405

_____________________________________________________

                                         Σf = 38+x                      Σfm = 1080+15x

______________________________________________________

Given Mean = 25.2

Mean = Σfm/Σf

25.2 = 1080+15x/38+x

25.2 × (38+x) = 1080+15x

957.6+25.2x = 1080+15x

25.2x - 15x = 1080 - 957.6

10.2x = 122.4

x = 122.4/10.2

x = 12

Missing frequency = 12  Answer

You might be interested in
398.574986215 to the nearest ten-thousandth.
Julli [10]

Answer: 398.5750

Step-by-step explanation:

It is important to remember that the fourth digit after the decimal point is in the ten-thousandth place.

Then, given the  following number:

398.574986215

You can follow these steps in order ti round it to the nearest ten-thousandth:

1. You can identify that the digit in the ten-thousandth place is:

9

2. Identify the digit to the right of 9. This is:

8

3. Since:

 8>5

 You must round up. Increase the digit 9 by 1. (Notice that 9+1=10, then the digit to the left of  9 increases by 1 too). Then:

398.5750

3 0
3 years ago
What is the slope of the line for (-2,2) and (2,3)?
Allushta [10]

Answer:

y=1/4x slope is 1/4

Step-by-step explanation:

add 1 to 2 to get 3 for the change in y, then add 4 to -2 to get 2 for the change in x, then put the change in y (1), over the change in x (4), to get a slope of 1/4

5 0
2 years ago
What is the test that you can do to tell if a graph represents a function?
LenKa [72]
B. the vertical line test
3 0
2 years ago
Read 2 more answers
Definition: In x3, x is called the
Arturiano [62]

Answer:

it is exponent less than 1

3 0
2 years ago
PLEASE HELP IT’S DUE TMR!!
iragen [17]

4856

1.07

12.9

7.00

0.00199 (199)

0.000660 (660)

:)

3 0
2 years ago
Other questions:
  • Write the subraction problem 604-357. describe how you will subtract to find the difference
    9·2 answers
  • A set of dessert glasses are in the shape of a cone. If each glass is 9 cm across and 12 cm tall, what is the volume of each gla
    15·1 answer
  • 1. If the ratio of the ages of Kissi and Esinam is 3:5 and that of Esinam and Lariba is 3:5 and
    5·1 answer
  • $0.78 less than the normal price Right now it you buy 7 of them it Cookies are on sate! Today each cookie costs will only cost y
    5·1 answer
  • Theresa is considering a 7/23 balloon mortgage with an interest rate of 4.5%
    7·1 answer
  • -13 can be classified as a whole number, interger, or rational number
    7·2 answers
  • PLEASE HELP!!! 20 POINTS! I WILL MARK BRAINLIEST ALSO IF CORRECT!!
    8·1 answer
  • Solve for x……………………….
    14·2 answers
  • property damage liability pays for injuries to a driver or their passengers caused by an uninsured or underinsured driver. true
    5·1 answer
  • A box is to be constructed with a rectangular base and a height of h cm. the length, l, of the box is 10 cm, and the width, w, i
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!