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masya89 [10]
3 years ago
15

There are 4 answers for a single question on the exam and only one answer is correct. If a student guesses the answer for this q

uestion, what is the probability that the student selects the correct answer? (round to 2 decimal places) Answer:
Mathematics
2 answers:
konstantin123 [22]3 years ago
5 0

Answer:

Step-by-step explanation:

Each question has 4 options with only one correct answer and all other incorrect answers. Student is equally likely to pick any outcome in any given question. Hence, probability of choosing correct answer is 1/4 = 0.25

mark this as brainly pls.....

loris [4]3 years ago
5 0

Answer:

0.25

Step-by-step explanation:

There are 4 answer choices given and only 1 is correct. The other 3 will be incorrect.

To find the probability of getting the right answer, divide the number of correct answers by the total number of answer.

P(correct answer)=correct/total

There is 1 correct answer out of a total of 4 answer.

P(correct answer)=1/4

The question asks us to round to 2 decimal places.

P(correct answer)=0.25

The probability that the student selects the correct answer is 0.25.

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Answer:

The amount invested in bonds = 35,000

The amount invested in CD = 15,000.

Step-by-step explanation:

The total amount that Daniela invested is $50,000, this means if we call the amount invested in bonds b, and the amount invested in CD d, then we have:

b+d=50,000 this says the total amount Daniela invested is $50,000.

And since the amount invested in bonds b is $5,000 more than twice the amount Daniela put into the CD, we have:

b=5,000+2d.

Thus, we have two equations and two unknowns b and d:

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and we solve this system by substituting b from the second equation into the first:

b+d=50,000\\5,000+2d+d=50,000\\3d=45,000\\\\\boxed{d=15,000}

or, the amount invested in CD is $15,000.

With the value of d in hand, we now solve for b from equation(2):

b=5,000+2d\\b=5000+2(15,000)\\\boxed{b=35,000}

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