Let the income of the man be Rs. x Therefore, sum donated to NGO βAβ = Rs. 0.10x Sum left with NGO βAβ = 0.25 Γ 0.10x = Rs. 0.025x Sum donated to NGO βBβ = Rs. 0.16x Sum left with NGO βBβ = 0.2 Γ 0.16x = Rs. 0.032x Sum donated to NGO βCβ = Rs. 0.28x Sum left with NGO βCβ = 0.5 Γ 0.28x = Rs. 0.14x According to the question, 0.025x + 0.032x + 0.14x = 5910 Or, 0.197x = 5910 Or, x = 5910/0.197 = 30000 Therefore, income of man = Rs. 30000
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