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Leviafan [203]
2 years ago
14

the probability that a pupil in a class has a calculator is 0.87. what is the probability that the pupil does not have a calcula

tor? in a fraction?
Mathematics
1 answer:
chubhunter [2.5K]2 years ago
8 0

Answer:

13/100

Step-by-step explanation:

we know that

The probability of the event occurring plus the probability of the event not occurring must equal to 1

If the probability that a pupil in a class has a calculator is 0.87

then

The probability that the pupil does not have a calculator is equal to

1-0.87=0.13

Convert to fraction

0.13=\frac{13}{100}

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ololo11 [35]

Answer:

The total number of games won by Unicorn is 40.

Step-by-step explanation:

  • We are given with a word problem
  • We are asked to find the number of unicorns played during the season
  • We can do this in two steps

         Step 1: Finding the win percentage

         Step 2: Finding the number of unicorns played during the season

Step 1 of 2

Let the number of games played by unicorn be x.The unicorn won 60% of the first x-10 games That is $\frac{60}{100} \times(x-10)$

Combining the 8 games we get,

$$\begin{gathered}\frac{60}{100}(x-10)+8=\frac{60}{100} \times x-\frac{60}{100} \times 10+8 \\0.6 x-6+8=0.6 x+2\end{gathered}$$

Step 2 of 2

The unicorn totally won 65% of the games played.

That is $\frac{65}{100} \times x=0.65 x$

Equating both the equation gives

$$\begin{gathered}0.6 x+2=0.65 x \\2=0.65 x-0.6 x \\2=0.05 x \\\frac{2}{0.05}=x \\40=x\end{gathered}$$

5 0
2 years ago
there are 120 people attending a wedding reception. There are 16 tables. Some are round and some are square. the round table sea
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Consider the function f(x)=2x2+7x−30.<br><br> What are the zeros of the function?
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Answer:

Zeroes are: (-6, 0) and (2.5, 0)

x= -6  &  x= 2.5

Step-by-step explanation:

I recommend using desmos for graphing problems!

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The answer would be 48.
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last year the depth of the river was 4.2 feet deep. this year it dropped 24% find the depth of the river this year
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Step-by-step explanation:

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