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umka21 [38]
3 years ago
11

Helphelphelphelphelphelph ​

Mathematics
2 answers:
blagie [28]3 years ago
6 0

Answer:

first 2 are right and last is right, but 3 is 30 not 66

Step-by-step explanation:

Scorpion4ik [409]3 years ago
3 0

Answer:

you got 1 and 2 and 4 right but 3 is 30

Step-by-step explanation:

3 is 30 because you have to multiply before you add due to pemdas

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Tomtit [17]

Given:

The frequency distribution table.

To find:

The mean average score on a test.

Solution:

The frequency distribution table is

Marks (x_i)                   Frequency(f_i)                  f_ix_i

     x                                     a                               xa

     y                                     b                               yb

     z                                     c                               zc

  Sum                              a+b+c                          xa+yb+zc

Now, the mean average score on the test is

Mean=\dfrac{\sum f_ix_i}{\sum f_i}

Mean=\dfrac{xa+yb+zc}{a+b+c}

Therefore, the mean average score on the test is \dfrac{xa+yb+zc}{a+b+c}.

3 0
3 years ago
What kind of sequence is this?<br> 126, 112, 98, 84, ...
NeX [460]

Answer: its geometric

Step-by-step explanation:

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