In a test with 4 MCQs, each having 5 choices, how many answer patterns are possible? A. 19 B. 120 C. 625 D. 1024 Explanation: Total combinations = 5⁴ = 625.
In a party of 5 couples, 5 people are chosen. What is the probability of at least two couples? A. 5/21 B. 5/14 C. 9/14 D. 16/21 Explanation: Using combinations and the complement method gives 5/21.
In a kilometer race, A beats B by 50 m or 10 seconds. What is A’s time? A. 200 sec B. 190 sec C. 210 sec D. 150 sec Explanation: The ratio method gives A’s time as 190 sec.
In a journey of 24 miles, two-thirds of the distance is covered at 40 mph. Total time taken is ____. A. 14.4 min B. 20 min C. 28.8 min D. 32 min Explanation: Total time computed by segment speeds gives 32 minutes.
In a hostel, there were 100 students. If 20 more join and the average expense decreases by Rs. 5, what is the original average? A. Rs. 5000 B. Rs. 4600 C. Rs. 5400 D. Rs. 2300 Explanation: Using weighted average adjustment gives Rs. 5400.
In a hostel, food for 1200 boarders lasts one month. If borders are reduced, how long will it last? A. 20 days B. 30 days C. 35 days D. 50 days Explanation: With the same number, duration remains unchanged at 30 days.
In a hospital, injections last 15 days. If the number of patients increases, for how many days will they last? A. 10 B. 15 C. 16 D. 12 Explanation: Increased consumption reduces duration.
In a group of 60 children and 10 adults, each child gets sweets. Total sweets distributed are ____. A. 1160 B. 1100 C. 1080 D. 1210 Explanation: Calculated using ratio distribution.
In billiards, A gives B 20 points in 60 and C 30 points in 60. How many points does B give C? A. 50 B. 40 C. 25 D. 15 Explanation: Relative strength gives 25.
If food for 600 men lasts 30 days, how long for 1000 men? A. 20 days B. 18 days C. 28 days D. 36 days Explanation: (600×30)/1000 = 18 days.