CBSE · Class 11 · Mathematics · Sequences and SeriesWhat is the arithmetic mean (A.M.) between 4 and 20?
Step-by-Step Solution
The arithmetic mean of two numbers $a$ and $b$ is given by the formula $\frac{a + b}{2}$. Here, $a = 4$ and $b = 20$. Therefore, A.M. = $\frac{4 + 20}{2} = \frac{24}{2} = 12$. Thus, the correct option is B.
Detailed Options Breakdown
Option : 8
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Sequences and Series.
Option 1: 12 (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: 16
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Sequences and Series.
Option 3: 10
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Sequences and Series.
💡 Study Guide: This question tests core syllabus concepts from Sequences and Series. For formulas, key summaries, and mock exam reference guides, read the full Sequences and Series Revision Notes.