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Sphinxa [80]
3 years ago
13

In a class of 25 students, 24 of them took an exam in class and 1 student took a make-up exam the following day. The professor g

raded the first batch of 24 exams and found an average score of 74 points with a standard deviation of 8.9 points. The student who took the make-up the following day scored 64 points on the exam. what is the new average
Mathematics
1 answer:
gavmur [86]3 years ago
7 0

Answer:

The  value is   \mu_n  =  73.6

Step-by-step explanation:

From the question we are told that

   The total number of students is  N =  25

    The  number of student that took exam in class is  n  = 24

    The number that took make up exam is  k  =  1

     The  average score of the first 24 students is  \mu  =  74

       The  standard deviation is \sigma  =  8.9

      The  average score of the student who took make up test is \= x  =  64

Generally the new average is mathematically represented as

      \mu_n  =  \frac{( n * \mu ) +  \= x }{N}

      \mu_n  =  \frac{( 24 * 74 ) +  64 }{25}

       \mu_n  =  73.6

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Lacy opened a savings account and deposited $100. The account earns 6% interest compounded monthly if she wants to use the money
Dafna11 [192]

Answer:

Future Value= $112.72

Step-by-step explanation:

Giving the following information:

Initial deposit (PV)= $100

Number of periods (n)= 2*12= 24 months

Interest rate (i)= 0.06/12= 0.005

<u>To calculate the future value (FV), we need to use the following formula:</u>

FV= PV*(1 + i)^n

FV= 100*(1.005^24)

FV= $112.72

5 0
3 years ago
Which number below best represents a credit of $17.16?
PIT_PIT [208]
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3 0
3 years ago
Read 2 more answers
May someone help me with this quick math problem
vekshin1

Hello,

The correct answer is D) 2

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The median number of trips taken to the food store in 1 week is 2.

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8 0
3 years ago
Four friends played minutes golf. Their scores were -3, -2, -1, and 2.
kramer
I had the same question just yesterday and the correct answer was 1.5 
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6 0
3 years ago
Find the value of x in the below complementary angle 3x(5x+2)​
Natali [406]

Answer:

The value of x is 11

Step-by-step explanation:

<em>Two angles are complementary if the sum of their measures is 90°</em>

Let us use this rule to solve our question

∵ The angle of measure (3x)° and the angle of measure (5x + 2)°

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→ That means their sum equals 90°

∴ 3x + 5x + 2 = 90

→ Add the like terms in the left side

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→ Subtract 2 from both sides to move 2 from the left side to the right side

∵ 8x + 2 - 2 = 90 - 2

∴ 8x = 88

→ Divide both sides by 8 to find x

∵ 8x/8 = 88/8

∴ x = 11

∴ The value of x is 11

7 0
3 years ago
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