How manyr 3 letterwords can you make from the letters A,B,C and D, where letters cannot be repeated and are in alphabetical order? How man):I integers between 109909000 and 999999999 {9 digits) contain enlyr the digits 3,4 and "f? How man):r integers between 10000 and 99999 {5 digits}, contain only the digits 1,2,3,4,6,T and 9, and no digit appears twice? How man).r 3 letterwords can you make from the letters A,B,C,D,E,F,G,H and I, where letters cannot be repeated and are in alphabetical order? How man}; 10 letter words can you make from the letters A,B,C,D,E,F,G and H? How man}.r 3 letterwords can you make from the letters A,B,C,D,E,F and G, where letters cannot be repeated? \f\f