A. Assign values for the number of stars: We can assign values from 00 to 29, as there are 30% of students studying stars.
B. Assign values for the number of black holes: We can assign values from 30 to 69, as there are 40% of students studying black holes.
C. Assign values for the number of planets: We can assign values from 70 to 79, as there are 10% of students studying planets.
D. Assign values for the number of comets: We can assign values from 80 to 99, as there are 20% of students studying comets.
To simulate the probability that at least 2 will be studying stars, we can use the complement rule, which states that the probability of an event happening is 1 minus the probability of the event not happening. So, we need to find the probability that no more than 1 student is studying stars.
To do this, we can use the random-number table and choose four values. If two or more of these values are between 00 and 29, then at least 2 students are studying stars.
We can simulate this process several times and count the number of times we get at least 2 students studying stars. Using the table, we obtain the following values:
1823 3516 6891 1388 D 1026 3248 8717 5476 9046 8543 8447 2848 6521 Kra 0844 2646
Out of these 15 values, we get at least 2 students studying stars in 7 cases: 1823, 6891, D, 8717, 9046, 8543, and 8447.
Therefore, the simulated probability that at least 2 students will be studying stars is 7/15 or approximately 0.47 (rounded to two decimal places).