Loading...
UPSC 1999: In an office, the distribution of work hours is as shown in the following table: No. of Staff Members | No. of hours worked 5 | 0 – 19 12 | 20 – 24 25 | 25 – 29 40 | 30 – 34 15 | 35 – 39 8 | 40 – 45 Consider the following inferences drawn from the table: I. The average number of hours worked by a staff member is about 30. II. The percentage of those who worked 35 or more hours is less than 25. III. At least 5 staff members worked more than 44 hours. Which of these inferences is/are valid?
(a)I alone
(b)II alone
(c)I and II
(d)I, II and III
Attempt This Question
Not attemptedCorrect Answer: (c) I and II
Using class mid-points, the estimated total work-hours are 3 164 for 105 staff, giving an average ≈ 30 h (Inference I valid). Staff working ≥35 h are 15 + 8 = 23 → 23⁄105 ≈ 22 %, under 25 % (Inference II valid). Hours > 44 cannot be guaranteed because the 40–45 class may all be ≤44; Inference III is therefore not necessarily true. Thus only I and II hold. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1999-solved-question-paper/?utm_source=openai))
Related UPSC Questions
More from Quantitative Aptitude
1999moderate
The average speed of a train in the onward journey is 25% more than that of the return journey. The train halts for one hour on reaching the destinati
1999moderate
In a town 25% families own a phone and 15% own a car. 65% families own neither a phone nor a car. 2000 families own both a car and a phone. Consider t
1999moderate
The yield versus fertilizer input is shown in the graph. Consider the following statements based on this graph: I. Yield rate is zero at B and C. II.
Related Science & Technology Topics
1999Computer & Information Technology
Assertion (A): Information technology is fast becoming a very important field of activity in India. Reason (R): Software is one of the major exports o
1999Physics
Consider the following statement: An ordinary light bulb has a rather short life because the I. filament wire is not uniform. II. bulb cannot be evacu
Frequently Asked Questions
What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (c): I and II. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 146. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.