Example 20. The monthly salary of a person was Rs. 320 for each of the first three years. He next got annual increments of Rs. 40 per month for each of the following successive 12 years. His Salary remained stationary till retirement when he found that his average monthly salary during the service period was Rs. 698. Find the period of his service.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Example 20. The monthly salary of a person was Rs. 320 for each of the first
three years. He next goi annual increments of Rs. 40 per month for each of the
following successive 12 years. His Salary remained stationary till retirement when
he found that his average monthly salary during the service period was Rs. 698.
Find the period of his service.
Transcribed Image Text:Example 20. The monthly salary of a person was Rs. 320 for each of the first three years. He next goi annual increments of Rs. 40 per month for each of the following successive 12 years. His Salary remained stationary till retirement when he found that his average monthly salary during the service period was Rs. 698. Find the period of his service.
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