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Naomi has the following data: $\newline$ $1, 1, 15, u, 3$ $\newline$ If the mean is $7$ , which number could $u$ be? $\newline$ Choices: $\newline$ $(A)$ $15$ $\newline$ $(B)$ $25$

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Math Problems

Grade 7

Mean, median, mode, and range: find the missing number

Full solution

Q. Naomi has the following data:

\newline

1, 1, 15, u, 3

\newline

If the mean is

7

, which number could

u

be?

\newline

Choices:

\newline

(A)

15

\newline

(B)

25

Arrange data set: Arrange the data set including $u$ in any order since we are calculating the mean, not the median or mode.
Solve for $u$ : Solve for $u$ .
Check solution: Check if $u = 15$ fits the choices given.

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Naomi has the following data:\newline1,1,15,u,31, 1, 15, u, 31,1,15,u,3\newlineIf the mean is 777, which number could uuu be?\newlineChoices:\newline(A)(A)(A)151515\newline(B)(B)(B)252525

Naomi has the following data: $\newline$ $1, 1, 15, u, 3$ $\newline$ If the mean is $7$ , which number could $u$ be? $\newline$ Choices: $\newline$ $(A)$ $15$ $\newline$ $(B)$ $25$