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erik [133]
3 years ago
7

Nizar was computing a Statistics problem asking for the probability of Event A. His answer was 1.36 Using your knowledge of prob

ability, why should Nizar have known that his answer was NOT correct and gone back to review his calculations?
Mathematics
1 answer:
luda_lava [24]3 years ago
5 0
Probability measures the likelihood that an event will occur. In this regard, it was right to use probability to establish if event A will occur or not. However, probability is normally quantified between 0 and 1 or between 0% and 100%. In this case, 0 (or 0%) is a measure of impossibility that an event will occur while 1 or (100%) is a measure that the event will occur.

In the current case, 1.36 violates this basic rule as it is more than 1 or the % sign may be missing. In this case, the Nizar should repeat the calculation taking into consideration any mathematical signs.
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Breann solved the system of equations below. What mistake did she make in her work? 2x + y = 5 x − 2y = 10 y = 5 − 2x x − 2(5 −
goldfiish [28.3K]

Answer:

No mistake

Step-by-step explanation:

2x + y = 5

x - 2y = 10

y = 5 - 2x

x - 2(5 - 2x) = 10

x - 10 + 4x = 10

5x - 10 = 10

5x = 20

x = 4

2(4) + y = 5

y =  -3

She made no mistake

You can check by plugging in x = 4 and y = -3 into the original equations . They fit exactly.


5 0
3 years ago
Using the exchange rate £1 = $1.34, calculate how many £ are in $7.25. Give your answer rounded to 2 dp.
ipn [44]

Answer:

£5.41

Step-by-step explanation:

7.25/1.34 = 5.41044...

Round = 5.41

6 0
3 years ago
Read 2 more answers
The head of a nail is circular, as shown. The head of this nail has a diameter of 6 millimeters.
Tcecarenko [31]

Answer:

its A

Step-by-step explanation:

Hope it helps

6 0
3 years ago
Please HELPPPPP!!! <br><br> I DONT KNOW WHY IM GETTING THEM WRONG
Nady [450]

Answer:

n = -33

Step-by-step explanation:

Let n = number

Sum of a number and 9

(n+9)

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the result is six less then twice the number

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3(n+9) = 2n-6

Distribute

3n+27 = 2n-6

Subtract 2n from each side

3n-2n +27 = -6

n +27 = -6

Subtract 27 from each side

n+27-27 = -6-27

n =-33

3 0
3 years ago
As instructor grades exams, 30%; term paper, 20%; and final exam, 50%. A student had grades of 75,80, and 85, respectively, for
Leni [432]
Okay, so 75 counts for 30% (exams), 80 counts for 20% (term paper), and 85 counts for 50% (final exam)

So you would multiply 30% by 75, 20% by 80, and 50% by 85. That would be 22.5, 16, and 42.5. Add these numbers up, and put them over the total percentage, 100%. So you would have 81/100. The student's final average is 81%.
6 0
3 years ago
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