A number theory problem by komal bhanot
Number Theory
Level
pending
The averase monthly income of 4 earning members of a family is Rs 7350. One member passes away and the average monthly income becomes Rs 6500. What was the monthly income of the person, who is no more?
The answer is 9900.
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1 solution
Required income = n(a-b)+b where n=4 Initial average, a = Rs 7350 Last average, b = Rs 6500 Monthly income of the person, who is no more = 4(7350-6500) +6500 = 4*850+6500= 3400+6500 = 9900