Midterm binomial Poisson questions

On average, 60% of fast-food workers earn less than $10 per hour.

1) For 8 workers, probability that no more than half earn less than $10/hour. (0.406)

2) For 16 workers, probability that at least 6 earn at least $10/hour. (0.671)

3) For 7 workers, which is more likely: that at least 4 earn less than $10/hour or at least 2 earn at least $10/hour (latter at 0.841)

At a movie concession stand, a clerk can serve 2 customers per 5 minutes on average.

4) In 15 minutes, probability a clerk can serve at least 3 customers. (0.938)

5) In 4 minutes, probability a clerk can serve at least 1 but no more than 3. (0.7192)

6) There are 3 clerks. It is 3 minutes to the movie starting. What is the probability that the first 4 customers will be served before the movie starts? (0.4847)