Home > Statistics > jee_main_2026_april_8_shift_2 > 4e131cbfd62c432891427863a7f8c531
Not the exact question you were looking for?

Paste your question to our Mathbee AI Mentor below to get an instant step-by-step solution.

Statistics
Measures of Central Tendency
jee_main_2026_april_8_shift_2
Grade None

Question:

The mean of 8 observations is 20. If one observation 27 is removed, find the new mean.
A. 18
B. 18.5
C. 19
D. 19.5

Step-by-Step Solution

Key Concept: Sum of observations = mean × n.
Step 1: Old sum = 20 × 8 = 160. Step 2: New sum = 160 - 27 = 133. Step 3: New mean = 133/7 = 19.
Correct Answer: C
Mathbee AI Mentor (Free Demo)

Confused by the solution? Ask the AI to explain a specific step, tell you where you went wrong, or break down the key trap in this question.

Master Statistics with Mathbee

Practice this topic under real exam conditions with strict timers, or ask our AI Mentor to explain the concepts step-by-step.

Start Practicing for Free