Question:
The average of the first five multiples of 9 is:
The average of the first five multiples of 9 is:
Show Hint
For an odd number of terms in an AP, the average is exactly the middle term.
Updated On: May 13, 2026
- 20
- 27
- 28
- 30
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Concept
The average of a set of numbers in an Arithmetic Progression is the middle term.
Step 2: Meaning
The first five multiples of 9 are: 9, 18, 27, 36, 45.
Step 3: Analysis
Average = $(9 + 18 + 27 + 36 + 45) / 5 = 135 / 5 = 27$.
Step 4: Conclusion
The average is 27. Final Answer: (B)
Was this answer helpful?
0
0
Top GAT B Mathematics Questions
- If the average diameter of air bubbles in a bioreactor is 2 mm and the gas hold up is 10%, then the surface area of gas bubbles per liter of reactor is:
- The cross product of vector \( \vec{A} \) and vector \( \vec{B} \) has a magnitude of 50 units, where vector \( \vec{A} \) has a magnitude of 10. The angle between vector \( \vec{A} \) and \( \vec{B} \) is 60 degrees. What is the magnitude of vector \( \mathbf{B} \)?
- The salary of a worker is first increased by 5% and then it is decreased by 5%. What is the change in his salary?
- The sum of four consecutive even numbers is 107 more than the sum of three consecutive odd numbers. If the sum of the smallest odd number and the smallest even number is 55, then what is the smallest even number?
- In an election contested by two candidates, one candidate got 30% of total votes and lost by 500 votes. The total number of votes polled is:
View More Questions
Top GAT B Questions
- Which one of the following modifications is NOT a natural N-terminal modification of proteins?
- Bacillus thuringiensis CryA controls certain caterpillar pests by
- Respiratory pathway is considered as a ________ pathway
- Many enzymes catalyze both forward and reverse reactions. Which one of the following statement is NOT correct?
- Which law of thermodynamics states that "energy of an isolated system is constant"?
View More Questions