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					 A man’s pension on retirement from service is equal to half the average salary during last 3 years of his service. His salary from 1-1-1983 is ₹380 per month with increment of ₹40 due on 1-10-83, 1-10-84 and 1-10-85, If he retires on 1-1-86, what pension does he draw per month?
 
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-  ₹205 
 -  ₹215 
 -  ₹225 
 - ₹230
 
 -  ₹205 
 
Correct Option: B
O the basis of given details in question , we have 
Total salary of 3 years = ₹(380 × 9 + 420 × 12 + 460 × 12 + 500 × 3) 
Total salary of 3 years  = ₹(3420 + 5040 + 5520 + 1500) = ₹15480 
Average monthly salary = 15480 ÷ 36 = ₹430
∴ Amount of pension = 430 ÷ 2 = ₹215