100+ Average Questions for Competitive Exams with Solutions - 1
Question: 1
Mean of eight numbers is 38.4 and the mean of seven of them is 39.2. What is the eight number?
(A) 3.2
(B) 31.2
(C) 32.8
(D) 34.8
Ans: C
Sum of eight numbers = 8 × 38.4 = 307.2
Sum of seven numbers = 7 x 39.2 = 274.4
∴ Eighth number = 307.2 – 274.4 = 32.8.
Question: 2
In seven given numbers, the average of first four numbers is 4 and that of the last four numbers is also 4. If the average of these seven numbers is 3, the fourth number is
(A) 4
(B) 7
(C) 11
(D) 13
Ans: C
Fourth number = ( 4 × 4 + 4 × 4 – 7 × 3) = 11.
Question: 3
Find the average of all the numbers between 6 and 34 which are divisible by 5.
(A) 18
(B) 19
(C) 20
(D) 22
Ans: C
Average = $$({10 + 15 + 20 + 25 + 30} / {2})$$ = $${100} / {5}$$ = 20.
Question: 4
The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is
(A) 15 years
(B) 15.5 years
(C) 16 years
(D) Cannot be computed with the given information
Ans: D
Clearly, to find the average, we ought to know the number of boys, girls or students in the class, neither of which has been given.
So, the data provided is inadequate.
Question: 5
The average of five numbers is 306.4. The average of the first two numbers is 431 and the average of the last two numbers is 2145. What is the third number?
(A) 108
(B) 241
(C) 321
(D) 411
Ans: B
Third number = [306.4 × 5 – (431 × 2 + 324.5 × 2)]
= (1532 - 1291) = 241.
- Top 100+ Average Aptitude Questions and Answers
- 100+ Problems on Average Aptitude Questions for Bank Exams
- 100+ Average Questions with Solutions Pdf
- 100+ Average Questions for Competitive Exams with Solutions
- Top 1,000+ Aptitude Averages Online Test
- 1000+ Quantitative Aptitude for Bank Exam Question and Answer
- 1000+ General Aptitude Test Papers with Answers
- 1000+ Suncorp Bank Aptitude Test Questions and Answers Pdf
- 1000+ Maths Entrance Exam Questions and Answers Pdf
- Scholastic Aptitude Test Questions with Answers
GA Questions asked in IBPS PO Mains 2024 | 2025 More
GK Questions 2024-2025 for IBPS PO Exams More
GATE CSE Mock Test 2024-2025 More
Tissues and Tissue System NEET Questions Pdf More
Top 10 Computer Quiz Questions More
C# Interview Questions and Answers for Experienced More
7000+ TNPSC Indian National Movement Study Materials Pdf Download More
Computer Quiz Questions with Answers for Class 9 More
General Awareness Gk Questions and Answers More
Top 10,000+ Basic World GK Questions and Answers More