During the last week of November 2020, the neighborhood of Gravesend, Brooklyn had an 8% positive rate for COVID. This means that about 8% of people who took COVID tests during the last week of November tested positive. This was the highest COVID positive rate in in city during this period of time–compare this rate to the average for Queens which was about 4%. Suppose we randomly select 10 people who tested for COVID in Gravesend. What is the probability that exactly one of them tested positive? What is the probability that none of them tested positive? What is the probability that three or more of them tested positive?

During the last week of November 2020, the neighborhood of Gravesend, Brooklyn had an 8% positive rate for COVID. This means that about 8% of people who took COVID tests during the last week of...

During the last week of November 2020, the neighborhood of Gravesend, Brooklyn had an 8% positive rate for COVID. This means that about 8% of people who took COVID tests during the last week of November tested positive. This was the highest COVID positive rate in in city during this period of time–compare this rate to the average for Queens which was about 4%. Suppose we randomly select 10 people who tested for COVID in Gravesend.
- What is the probability that exactly one of them tested positive?
- What is the probability that none of them tested positive?
- What is the probability that three or more of them tested positive?

Jun 09, 2022