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kodGreya [7K]
3 years ago
11

Is this right ? Can someone tell me pls

Mathematics
1 answer:
Sliva [168]3 years ago
5 0

Answer:

yeah i think so

Step-by-step explanation:

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a student ran out of time on a multiple choice exam and randomly guess the answers for two problems each problem have four answe
katen-ka-za [31]

Answer:

The probability that he answered neither of the problems correctly ​is 0.0625.

Step-by-step explanation:

We are given that a student ran out of time on a multiple-choice exam and randomly guess the answers for two problems each problem have four answer choices ABCD and only one correct answer.

Let X = <u><em>Number of problems correctly ​answered by a student</em></u>.

The above situation can be represented through binomial distribution;

P(X=r)=\binom{n}{r}\times p^{r}\times (1-p)^{n-r};x=0,1,2,3,....    

where, n = number of trials (samples) taken = 2 problems

           r = number of success = neither of the problems are correct

           p = probability of success which in our question is probability that

                 a student answer correctly, i.e; p = \frac{1}{4} = 0.75.

So, X ~ Binom(n = 2, p = 0.75)

Now, the probability that he answered neither of the problems correctly ​is given by = P(X = 0)

             P(X = 0) = \binom{2}{0}\times 0.75^{0}\times (1-0.75)^{2-0}

                            = 1 \times 1\times 0.25^{2}

                            = <u>0.0625</u>

6 0
4 years ago
A recipe asks for 5 tablespoons of applesauce for every 8 muffins.how much applesauce will be needed for 48 muffins?​
tamaranim1 [39]

Answer:

30 tbsp.

Step-by-step explanation:

you see how many times 8 goes in to 48 to determine how much u increased u recipe by so ur recipe is 6 times greater then multiply 6 by5 and get 30

6 0
3 years ago
Read 2 more answers
Find the measure of two supplementary angles, C and D, if C=6x-4 and D=4x+9
Anastaziya [24]

Answer:

x = 17.5 mm

Step-by-step explanation:

Supplementary means that two angles adds up to 180 degrees.

If C and D are supplementary, that means that they equal to 180 degrees.

Combine like terms:  6x - 4 + 4 + 4x + 9 - 9 = 180 + 4 - 9

10x / 10 = 175 / 10

x = 17.5

So, x = 17.5 mm

4 0
3 years ago
A set of ordered pairs is listed:
Dimas [21]

Answer:

A) (4, 8)

General Formulas and Concepts:

<u>Algebra I</u>

  • Functions
  • Vertical Line Test - The function must have only one y-value per x-value

Step-by-step explanation:

<u>Step 1: Define</u>

Relation {(4, -5), (-3, -2), (5, -2), (1, 7), (4, 8)}

<u>Step 2: Identify</u>

When we apply the Vertical Line Test, we see that we have an error at x = 4. Therefore, this relation is not yet a function.

We can see that if we remove either (4, -5) or (4, 8), the relation would then pass the Vertical Line Test and become a function.

Therefore, our answer is A) (4, 8)

8 0
4 years ago
7×100=7× 1 complete the pattern
Karo-lina-s [1.5K]

7 or 429 not really sure tbh

3 0
3 years ago
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