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wel
1 year ago
11

Twelve students took a test and their average score was 85. However, Bob was sick that day. after Bob took the test, the average

score dropped to 82. what was bob's score on the test?
Mathematics
1 answer:
Anestetic [448]1 year ago
8 0

Given:

Total number of students, n=12.

The average score of 12 students, a=85.

After Bob took the test, the number of students attended the test, N=13.

The new average score, A=82.

The total score of 12 students is the product of their average score and the number of students.

Hence, the total score of 12 students is,

\begin{gathered} t=a\times n \\ t=85\times12 \\ t=1020 \end{gathered}

The total score of 13 students is,

\begin{gathered} T=A\times N \\ T=82\times13 \\ T=1066 \end{gathered}

Now, Bob's score can be calculated as,

\begin{gathered} B=T-t \\ B=1066-1020 \\ B=46 \end{gathered}

Therefore, Bob's score on the test is 46.

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kondor19780726 [428]

Answer:

I solved this like you would a system of equations - if that is not the answer you need LMK

Point form:

(- 1/11, 32/11)

Equation Form:

x = -1/11, y = 32/11

Step-by-step explanation:

8 0
3 years ago
The average number of accidents is 3 per month, what is the probability of 1 accident?
tatuchka [14]
<h2>Hello!</h2>

The answer is: 33.33%

<h2>Why?</h2>

Since we have the average number of accidents that occurs in 1 month, and it's equal to 3, we can calculate the probability of 1 accident occurs by dividing it into the average number of accidents, using the following formula:

Probability=\frac{FavorableOutcomes}{Outcomes}*100

Where,

Favorable outcomes are the occurrence of the event, for this case, it's equal to 1.

Outcomes are the possible occurrence of the event, for this case, it's equal to 3.

So, by substituting we have:

Probability=\frac{1}{3}*100

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So, the probability will be equal to 33.33%

Have a nice day!

7 0
3 years ago
Find the square root of 25/49
Nuetrik [128]

Answer: 5/7

Step-by-step explanation:

Just take the square root of the top and the bottom. Square root of 25=5 and the square root of 49=7, so the square root of 25/49=5/7

5 0
3 years ago
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Which of the following is equal to (3x/5-7)+7?
Ronch [10]
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the answer is </span><span>b. 3x/5</span>
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3 years ago
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Fynjy0 [20]

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Hope this helps!

5 0
3 years ago
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