Average – Aptitude MCQ Questions – 01 Posted on July 6, 2020July 6, 2020 by admin Question 1The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result? A. 74 B. 75 C. 69 D. 78 Question 2Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is : A. 25.5 B. 32 C. 30 D. 34.5 Question 3In a boat there are 8 men whose average weight is increased by 1 kg when 1 man of 60 kg is replaced by a new man. What is weight of new comer? A. 70 years B. 66 years C. 68 years D. 69 years Question 4The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is A. 21 years B. 18 years C. 15 years D. 9 years E. 12 years Question 5The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday and Saturday was 41° C. If temperature on Saturday was 42° C, what was the temperature on Wednesday? A. 39° C B. 44° C C. 38° C D. 41° C Question 6Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 runs. His new average is: A. 20 B. 21 C. 28 D. 32 Question 7The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group? A. 3 B. 4 C. 5 D. 6 E. 7 Question 8Find the average of first 97 natural numbers. A. 47 B. 37 C. 48 D. 49 E. 49.5 Question 9The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey. A. 125 km/hr B. 75 km/hr C. 135 km/hr D. 120 km/hr Question 10The average of the first five multiples of 9 is: A. 20 B. 27 C. 28 D. 30