The probability of a student passing the exam in chemistry during the examination session is 0.8, in mathematics
| May 6, 2021 | education
The probability of a student passing the exam in chemistry during the examination session is 0.8, in mathematics – 0.7, in history – 0.9. Find the probability that a student will pass: a) only one exam; b) only two exams; c) all three exams.
1) Let’s find the general probability.
0.8 + 0.7 + 0.9 = 2.4.
2) Let us find the probability that a student will pass only one exam.
2.4 / 1 = 2.4.
3) Let us find the probability that a student will pass only two exams.
2.4 / 2 = 1.2.
4) Let’s find the probability that a student will pass all three exams.
2.4 / 3 = 0.8.
Answer. The probability that a student will pass only one exam is 2.4, only two exams are 1.2, all three are 0.8.
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