Question

Ella's college professors assign homework independently from each other. Ella knows that there is a 60% chance that she will have math homework tonight and a 70% chance that she will have English homework. What is the probability that she will NOT have math or English homework tonight?

Answer 1

0.4 * 0.3 = 0.12 = 12%

Answer 2

Probability that she will not have math homework: 1 - 0.6 = 0.4
Probability that she will not nave English homework : 1 - 0.7 = 0.3
Probability that she will not have math and English homework:
0.4 * 0.3 = 0.12 = 12%