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
tester [92]
3 years ago
8

There are 15 boys and 10 girls in a hall, each holding coins in their hand.The mean number of coins for the children is 10 The m

ean number of coins for the boys is 8Work out the mean number of coins for the girls.
Mathematics
1 answer:
DiKsa [7]3 years ago
6 0

Answer:

13 coins

Step-by-step explanation:

There are 25 kids in total.

The fraction of kids that are boys and girls are:

B=\frac{15}{25}=0.6\\B=\frac{10}{25}=0.4

The mean number of coins for all kids is given by:

M=B*M_B+G*M_G

If we are given that M = 10, and MB = 8, then the mean number of coins for the girls is:

10=0.6*8+0.4*M_G\\M_G=\frac{10-4.8}{0.4}\\M_G=13\ coins

The mean number of coins for the girls is 13.

You might be interested in
Solve the given inequality. Describe the solution set using the set builder or interval notation. Then graph the solution set on
Sophie [7]

Answer: THIRD OPTION.

Step-by-step explanation:

Given the following inequality:

3(x-5)\geq 6

You can follow these steps in order to solve it:

1. Apply Distributive property on the left side:

3(x-5)\geq 6\\\\(3)(x)+(3)(-5)\geq 6\\\\3x-15\geq 6

2. Add 15 to both sides of the inequality:

3x-15+(15)\geq 6+(15)\\\\3x\geq 21

3. Finally, divide both sides of the inequality by 3:

\frac{3x}{3}\geq \frac{21}{3}\\\\x\geq 7

 The symbol is \geq means "Greater than or equal to", and indicates that 7 is  include in the solution.

Therefore, the solution can be expressed as:

[7, \infty)

Now you must mark this point with a closed dot on the number line and shade everything to the right.

8 0
3 years ago
What value of s makes the equation true?
azamat

Answer:

-17 =s

Step-by-step explanation:

-8s +4 = -7s +21

Add 8s to each side

-8s+8s +4 = -7s+8s +21

4 = s+21

Subtract 21 from each side

4-21 = s+21-21

-17 =s

5 0
3 years ago
Read 2 more answers
Which equation best matches the scenario below?
siniylev [52]

Answer:

Definetly t = 4n

4 0
3 years ago
Please Show Work 6x(-4) Six times negative four.
Ainat [17]

Answer:

6 x (-4)

= (-24)

Step-by-step explanation:

when multiplying integers, you first need to multiply the numbers. Then you need to look at the signs if both numbers have the same signs or if it doesn't. if the signs are the same, the product is a positive . If the two numbers have different signs, you will get a negative product.

NOTE: if a number doesn't have a sign, it's a positive number

7 0
3 years ago
What is t²=81. thanks!!
seraphim [82]

Answer:

t= 9, t= -9

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • 3.9054 to 2 significant figure
    9·1 answer
  • A local parking garage charges $2.50 per hour. If Jason parks in the parking
    10·1 answer
  • Divide: 8.4 x 10^12<br> --------------<br> 4.2 x 10^6
    13·1 answer
  • Need help with trig question
    14·1 answer
  • Compare <img src="https://tex.z-dn.net/?f=5%5E%7B149%7D" id="TexFormula1" title="5^{149}" alt="5^{149}" align="absmiddle" class=
    10·1 answer
  • Does anyone know how I should answer this
    10·1 answer
  • Can someone explain how to do this worksheet? when graphing the lines they don't seem to intersect with a UFO.​
    6·1 answer
  • Graph the equation<br>y = -x + 3​
    7·1 answer
  • A serving of raisins contains 134 calories and 27 grams of carbohydrate. If raisins are a fat-free food, how much protein is pro
    15·1 answer
  • Can someone help me plz?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!