Question

A school newspaper reporter decides to randomly survey 17 students to see if they will attend Tet (Vietnamese New Year) festivities this year. Based on past years, she knows that 21% of students attend Tet festivities. We are interested in the number of students who will attend the festivities.

Answer 1

we use binomial distribution to solve this question

p=0.21

q=1-0.21=0.79

n=17

expected number of student visiting out of 17 students is

taking student as a whole number we can take 4 student by rounding up.

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