PRC-2 · Chapter 3 · Question 23 of 45
In a long-term contract structure representing an arithmetic progression, the 8th payment is Rs. 18,000 and the 12th payment is Rs. 26,000. What was the amount of the very first payment?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) Rs. 4,000
Explanation
We have two equations: a + 7d = 18000, and a + 11d = 26000. Subtracting the first from the second gives 4d = 8000, so d = 2000. Substituting d into the first equation: a + 7(2000) = 18000 -> a + 14000 = 18000 -> a = 4000.
More Mathematical Progression MCQs
- Q25What is the exact Arithmetic Mean inserted between the numbers 15 and 45?
- Q26What is the positive Geometric Mean inserted precisely between the numbers 9 and 25?
- Q27If the numbers 2, x, and 50 explicitly form a geometric progression, what are the possible mathematical values for 'x'?
- Q28In any given arithmetic progression, how is the 'common difference' strictly derived?
- Q29A worker saves Rs. 500 in month 1 and commits to increasing the savings by Rs. 200 every single month thereafter. What is the total…