For State Q:Male population below poverty line = 2.4 million.Let the female population below poverty line be x million.Then, 3 : 5 = 2.4 : x => x = 5 x 2.4/3 = 4.Therefore Total population below poverty line = (2.4 + 4) = 6.4 million.If Nq be the total population of State Q, then,25% of Nq = 6.4 million => Nq = (6.4 x 100)/25 million = 25.6 million.For State T:Male population below poverty line = 6 million.Let the female population below poverty line be y million.Then, 5 : 3 = 6 : y => y = 3 x 6/5 = 3.6.Therefore Total population below poverty line = (6 + 3.6) = 9.6 million.If Nt be the total population of State T, then,15% of Nt = 9.6 million => Nt = (9.6 x 100)/15 million = 64 million.Thus, Required ratio = Nq/Nt = 25.6/64 = 0.4 = 2/5.