Frank works in the supply room of a law firm. at the beginning of the month, he had 26 boxes of pens with 19 pens in each box. at the end of the month, there were 70 pens left. how many pens did he give out over the month?

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.)