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REY [17]
4 years ago
9

The probability that a grader will make a marking error on any particular question of a multiple-choice exam is 0.10. If there a

re ten questions and questions are marked independently, what is the probability that no errors are made
Mathematics
1 answer:
natka813 [3]4 years ago
5 0

Answer:

0.9^10

Step-by-step explanation:

The probability to make an error in 1 question =0.1 => The probability that this one particular question will be answered correctly is P=1-0.1=0.9

There are 10 questions  that are independent from each other .

The probability to be answered correctly is 0.9  each.  So the probability to answer correctly to all of them is

P(10quest=correct) =0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9=0.9^10

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Find the sum (the total measure) of the interior angles of a 17 sided polygon??
Lunna [17]

The formula in finding the sum or the total measure of the interior angles of polygon having n sides is:

Sum of interior angles = (n – 2) 180

Where n = number of sides of the polygon

In this problem, you are asked for the sum of the interior angles of a 17 sided polygon. You have to substitute the number of sides to the formula:

Sum of interior angles = (17 – 2) 180

Sum of interior angles = (15) 180

Sum of interior angles = 2,700 degrees

3 0
4 years ago
Read 2 more answers
Alexis was shopping on the ground floor of the mall when she realized she had left her phone in her car. She walks down 6 floors
expeople1 [14]

Answer:

-6

Step-by-step explanation:

-6 represents alexis position after she walks to her car.

the integer 0 represents the location of the ground floor!

hope this helped! <3

6 0
3 years ago
Lisa has 6 hours of studying to do . If she divides her study time into 1/2-hour sessions , how many study sessions will she nee
Svetradugi [14.3K]

Answer:

12

Step-by-step explanation:

6 / .5 (same as 1/2)

or 6 X \frac{2}{1}   = 12

Remember when we divide by a fraction we do the following

Keep it (the first number stays the same)

Change it (convert from a division problem to a multiplication problem)

Flip it (flip the fraction that we are dividing by over - this is called a reciprocal)

8 0
3 years ago
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Find the area of the trapezoid below. <br> 4 cm <br> 3 cm <br> 8 cm
Nastasia [14]

Answer:

18

Step-by-step explanation:

use this formula

A=(a+b )/2 x h

****

A= (4+8)/2 x 3

A=(12)/2 x 3

A= 6 x 3

A= 18

4 0
4 years ago
Twice the difference of three less than a number.
Veseljchak [2.6K]

Answer:

the answer would be 2(3-x)

Step-by-step explanation:

x would be the number that is given and since it says twice than 2 would be outside the parenthesis since the main equation would be inside the parenthesis

3 0
3 years ago
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