If there are 3 people in a room, what is the probability that at least one of them celebrates his/her birthday in April? 0.23 0.57 0.64 O 0.77

n persons are seated on n chairs at a round table. Find the probability that two specified persons are sitting next to each other.

A class contains 10 men and 20 women of which half the men and half the women have brown eyes. Find the probability that a person chosen at random is a man or has brown eyes. * 0.74 0.06 O 0.6 O 0.04 O Other:

American Airlines flights from Chicago to Dallas are on-time 71% of the time. Suppose 5 flights are randomly selected, and the number of on-time flights is recorded. The probability that exactly 4 flights are on time is The probability that at most 4 flights are on time is The probability that at least 4 flights are on time is

A coin is tossed six times. Find the probability that less than 3 tosses are tails.

A fair coin is flipped 4 times. Find the probability that heads was flipped exactly 2 times.

A coin is tossed 40 times. What is the probability that at most 39 heads appear?

Suppose 4 letters from a sign reading "Montreal" fell on the street. A mathematician find the 4 letters and randomly place them back on the sign (each of them on a spot where a letter fell off). What is the probability the sign reads "Montreal"?