In a group of students 30 read mathematics, 22 read statistics, 14 read mathematics only 8 read economics only 6 read mathematics and statistics only 2 read mathematics and economics only and 8 read none of these subjects. find how many students are there ina group. how many

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.)