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emmainna [20.7K]
3 years ago
8

A population with a mean of 7 has a sum of 42. how many scores are in the population

Mathematics
1 answer:
SVEN [57.7K]3 years ago
4 0
Mean = sum/N
7 = 42/N
N = 42/7 . . . . . multiply by N/7
N = 6

There are 6 scores in the population
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Answer:

  a)  |n -11| = 5

  b)  n ∈ {6, 16}

Step-by-step explanation:

The wording of the question is ridiculous. We assume it is intended to read, "The distance between two numbers is 5. One of the numbers is 11. What are the possibilities for the other?"

a) The distance between a number (n) and 11 can be written as ...

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Since we want that distance to be 5, we can write the equation ...

  |n -11| = 5

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b) The equation resolves to two:

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Adding 11 to both sides of both equations gives ...

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The two solutions are n=6 and n=16.

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<em>Comment on the question statement</em>

Increasingly, we see curriculum materials written in Pidgin English or where the words have a meaning different from that understood by a native English speaker. It appears you are the lucky recipient of such materials, so must do occasional "interpretation". Here, it seems that "two time a number" is intended to mean "two numbers."

4 0
3 years ago
(2 different questions)
kompoz [17]
1. m+n
2. n years old
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3 years ago
Read 2 more answers
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