Patterns are made using straight lines and arcs. a) Pattern A (one row) Pattern B (two rows)
(2)
More rows are added to Pattern B so that
number of straight lines : number of arcs = 7:6
How many rows are added?
TOAIO

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.)