2, science and technology books as "1" unit, literature books as "3", story books as "2", that is, their ratio is 1:3:2, so
Science and technology books =192x1(1+2+3) = 32, literature and art books =192x3/(1+2+3) = 96; Storybook = 192x2/6=64.
3. The currency ratio of Party A and Party B is: A: B =3/4:3/5=5:4, so A has 54x5/9=30 yuan; B There are 54x4/9=24 yuan.
4, 10 ÷ ( 1- 1/2- 1/6- 1/8) = 10 ÷ = 48.
5. The proportion of people who won the first, second and third prizes is 2:6:9, so the number of people who won the third prize is 68x9/(2+6+9)=36.