Một lớp học 40 học sinh gồm có 15 học sinh nam giỏi Toán và 8 học sinh nữ giỏi Văn. Chọn ngẫu nhiên một học sinh. Tính xác suất để chọn được một nam sinh giỏi Toán hoặc một nữ sinh giỏi Văn.

To solve this problem, we can use the concept of probability. The probability of an event happening is given by the formula: $$ Where: - $$ is the probability of event A or event B happening - $$ is the probability of event A happening - $$ is the probability of event B happening - $$ is the probability of both events A and B happening In this problem, we want to find the probability of choosing a boy good at Math ($$) or a girl good at Literature ($$). We are given that there are 15 boys good at Math and 8 girls good at Literature out of 40 students. So, we can calculate the probabilities as follows: $$ $$ Now, we need to find $$, which represents the probability of choosing a student who is both good at Math and Literature. Since it's not possible for a student to be good at both subjects, $$. Finally, we can use the formula to find the total probability: $$ So, the final answer is: The probability to choose a boy good at Math or a girl good at Literature is: 0.575