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m_a_m_a [10]
3 years ago
8

On a multiple-choice test with five possible answers for each question, what is the probability of answering a question correctl

y if you make a random guess? (write your answer as a decimal).
Mathematics
1 answer:
saw5 [17]3 years ago
8 0

The probability of answering correctly if you make a random guess is:

P = 1/5 = 0.2

<h3>How to find the probability for a random guess?</h3>

If you make a random guess, then you have no idea of which could (or couldn't) be the correct answer. Thus, all the 5 options have the exact same probability of being the correct one.

From this, the probability of answering correctly the question is given by the quotient between the number of correct answers (we assume is only one) and the total number of options (5).

So the probability is:

P = 1/5 = 0.2

If you want to learn more about probability, you can read:

brainly.com/question/251701

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A blueprint uses a scale factor of 3 inches = 2 feet. What is the area on the blueprint of a 3,500 square foot house in inches?
lyudmila [28]

Answer:

7875 square inches

Step-by-step explanation:

4ft^2 = 2ft * 2ft

4ft^2 = 3in * 3in

4ft^2 = 9in^2

For 3,500 square foot

3,500 square foot  = x

Divide bith expressions

4/3500 = 9/x

4x = 9 * 3500

4x = 31500

x = 31500/4

x = 7875 square inches

Hence the area of the house in inches is 7875 square inches

6 0
3 years ago
Please help me with this. I give brainliest and give ratings. Don't answer just to take my points or your getting reported
Maksim231197 [3]

Answer:

1/7 +5/9={1×9+5×7)/(9×7)=44/63is your answer

7 0
3 years ago
tanya has 3 red marbles 7 blue marbles and 9 green marbles what expression can be used to to find the percent of tanyas marbles
stepladder [879]

Answer: 3+7+9=19.....7/19=0.368 percent. Move the decimal two places to the right and round up for 37%

Step-by-step explanation:

Add all the colors together to get a TOTAL amount of ALL marbles.

The total amount for this problem is 19 (3+7+9=19)

The blue amount of marbles is given as 7.

Divide the blue amount (7) by the total amount (19) for the specific percentage for that color.

6 0
3 years ago
6500 rounded to the nearest thousand is __. Enter your answer without commas
gtnhenbr [62]

Answer:

7000

Step-by-step explanation:

If the hundreds place is higher than 5, then add 1 to the thousands place.

6 0
3 years ago
05.02 MC)
Rufina [12.5K]

Step-by-step explanation:

First she will start by mutiplying the two numbers.

6 0
2 years ago
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