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
ivanzaharov [21]
3 years ago
7

the mean of marks scored by 100 students was found to be 40. Later on, it was discovered that a score of 53 was misread as 83. F

ind the correct mean.
Mathematics
1 answer:
liberstina [14]3 years ago
3 0

As the sum of marks of others remain unchanged , let their sum be x . As the mean using 83 was 40 , we have ,

(x +83)/100 = 40

x + 83 = 4000

x = 3917

Now mean using 53 ,

(x +53)/100

(3917+53)/100

39.7.

Hope it helps , plz mark as brainiest :-)

You might be interested in
The graph shows the function f(x)=3^x
tangare [24]
The answer is D.
You have to make the whole numbers equal to then solve for the exponents:
F(x) means y, therefore, y is 9.
9 = 3^x.
3^2 is the same as 9.
Then, 3^2 = 3^x.
Then solve for the exponents,
2 = x
Therefore your answer is 2.
8 0
3 years ago
Provides a unique set of guidelines that can be applied to any triangle. The guidelines demonstrate a clear understanding of app
Oksi-84 [34.3K]

we can have a triangle  and we know that there are two angles. 

30º and a 45º + 105 =180º angle. applying the sides. 

therefore if we have the whole triangle completed we have a constant triangle. 


so it tell us we can you’se SOH CAH TOA 

we can varrify what kind of triangle we are using. 


for example if we were to use  Sin I would do 


Sin 30/ 2 = sin of 105º/ A = sin=45º/ B


if you would want to solve for  sin 30/2 and sin 105, then we solve. 

 

or Sin 30/2  and Sin 105 as well. 


with your calculator use sin= 30=.5  and use sin 105º a divide by 1.5 on both sides    1.5= A /sin 105º * 1.5   answer would be 3.86.  a is = to 3.86 (Not the answer)


5 0
3 years ago
13. Investing Your teacher invested $5000 in three funds. After a year they had $5450.
Kipish [7]

Answer:

Scrieți fracțile ordinare

8 0
3 years ago
SOLVING INEQUALITIES UNIT PORTFOLIO
noname [10]

Answer:

Step-by-step explanation:

I don't really know sorry I am not smart I only sign up to see the answers

6 0
3 years ago
Line’s family has completed 70% of a trip. They have traveled 35 miles. How far is the trip?
sergeinik [125]

Answer:

hi the answer to your question should be 50 miles

Step-by-step explanation:

hope this helps have a great day!

4 0
3 years ago
Other questions:
  • Jaden made a pot of chili with 48 ounces of ground beef and 2 tablespoons of chili powder. He made another pot
    15·2 answers
  • Rectangle LMNO is translated using the rule (x, y) → (x + 2, y + 2) to create rectangle L'M'N'O'. If a line segment is drawn fro
    9·2 answers
  • Given: F(x) = 3x^2+1, G(x) = 2x - 3, H(X) = x<br> Find F(x) + G(x) =
    11·1 answer
  • What is 22/2 x 7/3 what the answer as a fraction
    13·1 answer
  • 20 points
    8·1 answer
  • Grace and her brother Sid want to raise money to go to band camp. Their parents have agreed to help them up to $400 by paying th
    10·1 answer
  • The price of a litre of milk increased from $1.25 in 2004 to $1.35 in 2006. What is the average price increase per year?
    5·1 answer
  • What is the nth term rule of the linear sequence below?
    9·1 answer
  • Which inequality is true?
    15·1 answer
  • Five members of the computer club site to buy used computer dividing up the cost equally later three new members join a club of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!