5. Using the digits 0, 1, 2, 3, 5, 7, 8, how many three-digit numbera can be formed if repetitions are not permitted? A 120 B. 216 C.240 D. 180
6. There are 4 trails that lead to a scout camp on a hill, In how many ways can a scout go to the camp and go down by going up one trail and down by a different trail? A 20 B.16 C 12 D. 24
In how many ways can 4 boys and 4 girls be seated in a row of 8 seats if boys and girls are to occupy alternate seats? A. 1,080 B. 3,120 C. 1,152 D. 3,288 8. Four couples are to sit at round table. How many different sitting arrangements are possible if each couple insists on sitting together? A__ 12 B 48 C. 60 D. 96