If set R contains the consecutive integers from -5 to -1, what is

Question

If set R contains the consecutive integers from -5 to -1, what is the mean of set R?

A. -5
B. -3
C. 0
D. 3
E. 5

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dhart · Answer

looks like -15/5 i.e -3

counterclash1 · Answer

Correct Answer: B (-3)

PROBLEM CORE:
Set R = {-5, -4, -3, -2, -1}

KEY PROPERTY (Evenly Spaced Sets / Arithmetic Progression):
For any set of consecutive integers: Mean = Median = (First Term + Last Term) / 2

CALCULATION:
- First term = -5
- Last term = -1
- Mean = (-5 + -1) / 2 = -6 / 2 = -3

VISUAL INSPECTION:
The middle value (median) of {-5, -4, -3, -2, -1} is -3. 
Since the set is symmetric, Mean = Median = -3.

TheAdmissionHub · Answer

Set R: {-5, -4, -3, -2, -1}

Mean:  \frac{-5-4-3-2-1}{5}=\frac{-15}{5}=-3

Answer: B

TrophicEagle682 · Answer

sum = -15

avg = -15/5 = -3

so the answer is -3

G780MAT · Answer

-5 -4 -3 -2 -1

Centre value(mean) = sum of all the values/ no of values =-3

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