Question

Из 40 вопросов студент выучил 30. какова вероятность, что на экзамене студенту достанется не выученный вопрос?

Answer 1

Классическое определение вероятности A(P)= благ/общ
10/40= 1/4 = 0,25

Answer 2

40+30/100=0,7 по-моему так

Answer 3

Calculating the Probability of Getting an Unprepared Question on the Exam

To calculate the probability of a student getting an unprepared question on the exam, we can use the formula:

Probability = (Total number of unprepared questions) / (Total number of questions)

Given that the student has memorized 30 out of 40 questions, the total number of unprepared questions is 40 - 30 = 10.

Applying the Formula

Using the formula, the probability of the student getting an unprepared question on the exam is:

Probability = 10 / 40 = 0.25

So, the probability of the student getting an unprepared question on the exam is 0.25 or 25%.