A bag contains 3 red and 4 black balls. If two balls are drawn at random without replacement, what is the probability that both are red? MCQ with Answer and Explanation
Consider the following statements: 1. Weighted mean considers the relative importance of different items. 2. Combined mean depends on group sizes and group means. 3. Arithmetic mean is always the best measure for skewed data. Which is/are correct?
Explanation:
Geometric mean correctly averages multiplicative processes (e.g., compound growth rates) by taking the nth root of the product, avoiding bias from arithmetic mean in ratio contexts.
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