At a florist's shop two assistants made 13 flower arrangements in a certain amount of time. assuming all assistants will work for the same amount of time and each assistant is trained to work at the same rate, how many assistants are needed to make: 195 arrangements

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)