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devlian [24]
3 years ago
10

1 Officials estimate the probability that England will host the World Cup in 2018 is 58%. If the estimate is correct, what is th

e probability that England will not host the World Cup?
2 A weather forecast predicts the probability that it will snow the
following day is 23.
What is the probability that it will not snow the following day?


3 There is a 0.7 chance a tennis player will win her next match.
The probability that she will lose her next match is 0.2.
What is the probability the tennis player will draw her next match?

4 At a college, 160 students study Psychology.
120 of the students are female.
What is the probability a Psychology student chosen at random
will be female?

6 A train company calculates that the probability that a train will break down on any one day is 0.012.
On one particular day, the train company has 650 trains running.
How many trains does the train company estimate will break down that day?​
Mathematics
1 answer:
TiliK225 [7]3 years ago
3 0

Answer:

  1. 42%
  2. 1/23
  3. 1.1

4. 3/4

Step-by-step explanation:

  1. 100%_58%=42%
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Can some explain how to do this.
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We can simplify the expression by using exponent properties, and we will see that the correct option is the fourth option.

<h3>How to simplify the expression?</h3>

Remember the exponent property:

\frac{a^n}{a^m} = a^{n - m}

Here we have the expression:

\frac{83.9*10^{12}*2.87*10^{-3}}{3.76*10^2}

We can reorder this to get:

\frac{83.9*10^{12}*2.87*10^{-3}}{3.76*10^2} = \frac{83.9*2.87}{3.76}*\frac{10^{12}*10^{-3}}{10^2}

The right side can be simplified to:

\frac{83.9*2.87}{3.76}*\frac{10^{12}*10^{-3}}{10^2} = 64.04*10{12 - 3 - 2} = 64.04*10^{7}

Now, we can move the decimal point one time to the left and increase the exponent by one, so we get:

6.404*10^8

Then we conclude that the correct option is the last one (where I rounded the expression to only 3 values after the decimal point).

If you want to learn more about scientific notation:

brainly.com/question/5756316

#SPJ1

3 0
2 years ago
Help help plz help help me this is hard
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