Let n be the number of original students. • Let m be the number of new students. • Let x be the average weight of the original students. • The average weight of the new students is x + 3 kg. The average weight increases by 0.6 kg when new students join. Set up the equation for the new average weight: ⇒ (nx+m(x+3)) / (n+m) = x +0.6 ⇒ nx + mx + 3m = (x+0.6)(n+m) ⇒ nx + mx + 3m = nx + mx +0.6n+ 0.6m ⇒ 3m = 0.6n+ 0.6m ⇒ 3m - 0.6m = 0.6n ⇒ 2.4m = 0.6n ⇒ 4m = n  Therefore, the ratio of the number of original students to the number of new students is: 4:1

unable to understand solution The average weight of students in a class increases by 600 gm when some new students join the class. If the average weight of the new students is 3 kg more than the average weight of the original students, then the ratio of the number of original students to the number of new students is

unable to understand solution The average weight of students in a class increases by 600 gm when some new students join the class. If the average weight of the new students is 3 kg more than the average weight of the original students, then the ratio of the number of original students to the number of new students is