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Sloan [31]
4 years ago
10

Please help i need help on question b

Mathematics
2 answers:
wolverine [178]4 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]4 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

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Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
Tony walks 6/8 mile everyday how far does Tony walk in 5 days
Aleks [24]
Just multiply "6/8" times 5.

(6/8)(5)
 
(6/8)(5/1)

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6 0
4 years ago
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Anvisha [2.4K]

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Lol

Step-by-step explanation:

5 0
3 years ago
13. How much money will 8820 Vield in investa
zavuch27 [327]

9514 1404 393

Answer:

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Step-by-step explanation:

The formula for the account balance from continuously compounded interest at annual rate r for t years is ...

  A = Pe^(rt) . . . . P = principal invested

  A = 8820e^(0.05·3) ≈ 10,247.38 . . . continuous compounding

__

The formula for the account balance from interest compounded semiannually at annual rate r for t years is ...

  A = P(1 +r/2)^(2t)

  A = 8820(1 +.05/2)^(2·3) ≈ 10,228.50 . . . semiannual compounding

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7 0
3 years ago
X+y=8 You can find more Solutions by replacing x with other values and then solving for Y. For example, let X = 6. What is y? .
polet [3.4K]

Answer:

Step-by-step explanation:

x + y = 8 ⇔ y = - x + 8

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If x = 8 , then y = - 8 + 8 = 0

(8, 0)

4 0
3 years ago
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