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Calculate the probability that a randomly selected primary

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1) There are eight research projects with five projects about transportation and the rest are about Marketing. The research manager wants to assign four projects to a research team at random. Find the probability that the team will be assigned at least two projects about marketing.

(2) An education specialist conducted a survey to investigate the type of activities participated by primary school students last summer. From the result, 80% of the students participated in STEM courses. Among those students participated in STEM courses, 75% of them participated in sports courses. 10% of the students participated in neither STEM courses nor sports courses.

(i) Calculate the probability that a randomly selected primary school student participated in sports courses.

(ii) Calculate the probability that a randomly selected primary school student participated only in STEM courses or only in sports courses.

(iii) It is known that a randomly selected primary school student participated in sports courses. Find the probability that this student participated in STEM courses.

Reference no: EM132432505

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