6. A test consists of 25 multiple-choice questions each permitting a choice of 5 alternatives. In how many ways may a student fill in the answers if they answer each questions? 7. A jersey has 2-digit...

Extracted text: 6. A test consists of 25 multiple-choice questions each permitting a choice of 5 alternatives. In how many ways may a student fill in the answers if they answer each questions? 7. A jersey has 2-digit numbers. In how many ways can the number be arranged if (a) No double digit are allowed. (b) Double digits are allowed. 8. How many different numbers of five digits can be made using the digits 2,2,3,3,3? 9. There are four seats in a cinema hall. In how many ways can 4 people sit in a cinema hall if only two of them can sit in the front row?