In a certain year, the average monthly income of a person was Rs.3,400. For the first eight months of the year, his average monthly income was Rs.3,160 and for the last five months, it was Rs.4,120. His income in the eighth month of the year was
Options:
A . Rs.5,080
B . Rs.5,520
C . Rs.15,520
D . Rs.3,160
Answer: Option A Answer: (a)Using Rule 1, Person’s income in the eighth month = Rs.(3160 × 8 + 5 × 4120 – 12 × 3400) = Rs. (25280 + 20600 – 40800) = Rs. 5080
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