Four person decided to start a restaurant by sharing equal amount of the total investment. After some calculations they found that if they get two more equal investors, each of the four will have to pay Rs. 12000 less. What was the total investment?

Rs. 24000
Rs. 72000
Rs. 144000
Rs. 288000

Correct Answer: Rs. 144000

Explanation:

Let investment of each person be Rs. N
Total investment of 4 people = 4 x N = Rs. 4N
Investment of each person when two more people join them = Rs. (N - 12000)
∴ Total investment of 6 people = 6(N - 12000)
∵ 4N = 6(N - 12000)
⇒ 4N = 6N - 72000
⇒ 2N = 72000
∴ N = 36000
Hence total investment = 4 x 36000 = Rs. 144000

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