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
Sloan [31]
3 years ago
10

Please help i need help on question b

Mathematics
2 answers:
wolverine [178]3 years ago
5 0

Answer:

1500p or $15

Step-by-step explanation:

School either earns 20,

or loses 10 (20 - 30 = -10)

P(-10) = P(score is 7) = 3/12 = 1/4

P(20) = P(not a 7) = 1 - 1/4 = 3/4

Expected gain each game:

(-10)(1/4) + (20)(3/4)

12.5

If 120 games:

120 × 12.5

1500p

$15

anzhelika [568]3 years ago
3 0

There are 12 possible outcomes.....three of these will be a "7"  ...so...

A "7" should occur  1/4 of the time

If each player pays 20p to play.....the school  will take in  120 * 20  = 2400p

However.......1/4 of the players should win =  30 players.....and each lollipop costs 30p.....so......the school should spend 30 * 30  = 900p for the prizes

So......the school should raise   2400 - 900 = 1500p  if 120 people play the game

You might be interested in
HELP WILL MARK BRAINLIEST TO WHOEVER ANSWERS !!
Zanzabum
It lasted 13 minutes
5 0
2 years ago
Tell how to multiply two fractions give an example
mario62 [17]
Ex 1:
2/5 x 4/5
Multiply both the numerators together and then multiply both the denominators together. You would multiply 2x4 which is 8 and 5x5 which is 25. Which leaves you with 8/25 and it will stay that way because you cannot simplify it further.

Ex 2:
2/5 and 5/3
Multiply across 2x5/5x3 and you end up with 10/15 which can be simplified/reduced to 2/3 because they share a common factor of 5.
7 0
3 years ago
The population P of birds in an area is modeled by the exponential model
Tems11 [23]
(B)Decreasing is the answer
3 0
3 years ago
How are your finances connected to your beliefs? Own words
Liula [17]

Answer:

Due to religion you may be obligated to donate 10% or something of that matter.

Step-by-step explanation:

7 0
2 years ago
Why can you use Linear Pairs and Vertical Angles to prove lines are parallel?
natta225 [31]

Answer:

The reason why linear pairs and vertical angles are used to prove lines are parallel is because they area transversal drawn through the parallel lines will form angles on each of the two parallel lines including;

1) Supplementary linear pairs  and

2) Vertical angles

3) Alternate angles

Given that either;

a) The corresponding angles that form the linear pairs are congruent

b) The corresponding vertically opposite angles are congruent

c) The corresponding alternate angles are congruent, we have;

The two lines are said to be parallel.

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • What is 529 rounded to the nearest 100
    11·2 answers
  • Each year on the same day, Susan deposits $175 into a saving account that earns simple interest at a rate of 3.5%. She makes no
    10·1 answer
  • A large community college has professors and lecturers. the total number of faculty is 136. The school reported that they have 6
    15·1 answer
  • What is the measure of Angle DEF?
    14·1 answer
  • 9 more than the product of 3 and 12
    12·2 answers
  • 8. Identify the domain and range to the following relations and state whether or not the relations are functions. State why or w
    13·1 answer
  • Find the greatest common factor.<br> 2y^3, 8y
    10·1 answer
  • Answers and the work for them please
    15·1 answer
  • The diameter of a birch tree is proportional to its age. Use the graph to determine how long it takes for a birch tree to reach
    10·2 answers
  • What is 2 + 2 = ? ( If you can answer this question, go answer my 50 point worth question too.)
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!