In a classroom, the average weight of 20 boys is 60 kg and that of 30 girls is 50 kg. The combined average weight of all students is: MCQ with Answer and Explanation

Explanation:
Weighted indices assign weights (e.g., expenditure shares) to reflect the economic significance of items, providing a more realistic measure of overall change than simple indices that treat all items equally.

Explanation:
All outcomes except TT (1/4). So 1 - 1/4 = 3/4.

Explanation:
An unpublished thesis is a document containing data originally collected by someone else, making it secondary data for another researcher.