HomeMathematicsThe average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation? The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation?By Admin / September 23, 2025 A. 9 B. 8 C. 7 D. 6 ✅ The correct answer is option A. 9. 1 to 9 = 9 * 9 = 81
1. P and Q can complete a work in 15 days and 10 days respectively. They started the work together and then Q left after 2 days. P alone completed the remaining work. The work was finished in__________days. Leave a Comment / Basic Maths Mcqs MCQs, Mathematics / By Admin
The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream? Leave a Comment / Boats and Streams MCQs, Mathematics / By Admin