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arlik [135]
3 years ago
14

On a multiple choice test with 21 questions, each question has four possible answers, one of which is correct. for students who

guess at all answers, find the standard deviation for the number of correct answers
Mathematics
1 answer:
Rainbow [258]3 years ago
5 0

Answer:

Hello there, the answer is 5.25, or  5 1/4

Step-by-step explanation:

Since it has 21 questions, 4 choices each, we should divide 21÷4= 5.25

Inside of fraction form, the answer is 5 1/4

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A student randomly guesses at 10 multiple choice questions. Each question has four possible answers with only one being correct,
dlinn [17]
I would just assume <span>a) find the probability that the student guesses EXACTLY 4 correct.

</span>
8 0
4 years ago
**20 POINTS + BRAINLIEST** Please help me with the math question!
aliina [53]

Answer:

1/6.2=15/x

Step-by-step explanation:

15:x=1:6.2

6 0
3 years ago
Read 2 more answers
Find the pressure in N/m^2 exerted by a force of 42 N on an area of 7 m^2.
d1i1m1o1n [39]

Answer:

Answer:

Force = 42 N

Area = 7 m^2

Pressure = Force/Area

= 42/7

= 6 N/m^2.

Step-by-step explanation:

got it from brainly

5 0
3 years ago
Are the lines shown below parallel? Explain
lesantik [10]

Answer:

C. No, the slopes are not the same

6 0
3 years ago
Simplify the expression. -14 x 8 x 1/4 + (-22)
pochemuha
<span>-14 x 8 x 1/4 + (-22)

Apply BODMAS

Open the brackets:
</span>-14 x 8 x 1/4 + (-22) = <span>-14 x 8 x 1/4 -22

Division
-14 x 8 x (1/4) - 22 = </span><span>-14 x 8 x 0.25 - 22
</span><span>
Multiplication
</span><span>(-14 x 8 x 0.25 )- 22 = -28 - 22
</span><span>
Subtraction
-28-22 = -50

Correct answer: A <-50>




</span>
8 0
4 years ago
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