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Let the man’s income be ₹ p. According to the question, => p - p/7 - 3p/5 - p/4 = 200 => p(1 − 1/7 - 3/5 - 1/4) = 200 => p{(140 - 20 - 84 - 35)/140)} = 200 => p × 1/140 = 200 => p = 140 × 200 = Rs 28000