In a class there are 18 boys. If the ratio of boys to total class members is , how many girls are in the class?

When the ball has traveled a distance of

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

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.)