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Statistics
Measures of Central Tendency
jee_main_2026_april_8_shift_1
Grade None

Question:

The mean of 6 observations is 18. If one observation 12 is removed, find the new mean.
A. 18.2
B. 18.4
C. 18.6
D. 19.2

Step-by-Step Solution

Key Concept: Sum of observations = mean × n.
Step 1: Old sum = 18 × 6 = 108. Step 2: New sum = 108 - 12 = 96. Step 3: New mean = 96/5 = 19.2.
Correct Answer: D
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