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4 years ago

The probability that an event will occur is 0.1. What is the probability that the event will NOT occur

Mathematics

2 answers:

fredd [130]4 years ago

8 0

What that guy said
90%

prisoha [69]4 years ago

5 0

Answer: 0.9

Step-by-step explanation:

For any event A , the probability of event A will occur be P(A).

Then , the probability of not occuring the event A will be given by :-

$\text{P(A')=1-P(A)}$

The given statement : The probability that an event will occur is 0.1.

That is , $P(A)=0.1$

Now, the probability that the event will NOT occur is given by :-

$\text{P(A')}=1-0.1\\\\\Rightarrow\ \text{P(A')}=0.9$

Hence, the probability that the event will NOT occur = 0.9

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3 years ago

Tell which number is greater 80%, 7/9

Kipish [7]

Answer:

80%

Step-by-step explanation:

7/9 = 77.777777777778%.

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3 0

3 years ago

Over the last three evenings, Donna received a total of 129 phone calls at the call center. The third evening, she received 3 ti

lakkis [162]

Answer:

Number of calls received in 1st evening = 24

Number of calls received in 2nd evening = 33

Number of calls received in 3rd evening = 72

Step-by-step explanation:

Let

number of calls received in first evening be "x"

number of calls received in 2nd evening be "y"

number of calls received in 3rd evening be "z"

Total, in 3 evenings, we have 129 phone calls, so we can write:

x + y + z = 129

3rd evening, 3 times as first evening. We can write:

z = 3x

2nd evening, 9 MORE THAN FIRST. So we can write:

y = 9 + x

Now we replace 2nd and 3rd equation in 1st equation to get:

x + y + z = 129

x + 9 + x + 3x = 129

Now, first, we solve for x:

$x + 9 + x + 3x = 129\\5x+9=129\\5x=120\\x=24$

Solving for y:

y = 9 + x

y = 9 + 24

y = 33

Solving for z:

z = 3x

z = 3(24)

z = 72

Thus,

Number of calls received in 1st evening = 24

Number of calls received in 2nd evening = 33

Number of calls received in 3rd evening = 72

5 0

3 years ago

What is the approximate perimeter of the square with the area of 112cm^2.Step by step answers please?

Alex17521 [72]

First find the length of the side by taking the square root of 112.

There are 4 sides so multiply your answer by 4 to get the perimeter.

The answer is 42.332 which rounds to 42.

3 0

3 years ago

Mr. Taylor weighs 300 pounds. He went on the Subway diet and was guaranteed to lose 5 pounds per week. Write an equation that co

yaroslaw [1]

Answer:

1.) 300 - 5w = 150

2.) 30 weeks

Step-by-step explanation:

w = weeks on the diet

if every week he's on the diet, that means that the weeks * 5 is how many pounds he loses. If he's on the diet one week then he loses 5 pounds. 2 weeks then 10 pounds... etc. But because he's losing punds the value is negative

He starts at 300 pounds so the y-intercept (starting value) would be 300

Finally, because he's looking to get to 150 pounds, that is the final value you're solving for

So this is your firat equation:

300 - 5w = 150

Then we are looking for when two different eqaution have the same value.

Your equation is: 60 + 7w

Her equation is: 120 + 5w

Your final equation is 60 + 7w = 120 + 5w

Solve for this by getting w on one side, and your plain old variable-less value on the other. Do this by subtracting 5w from each side, as well as 60.

Your equation is now 2w = 60

Then divide the whole equation by 2, and you get w = 30

hope this helps, be safe :)

5 0

3 years ago