For each of the examples below, decide if X is a binomial random variable. If so, specify n and p. If not, explain why not.

a. X = number of heads from flipping the same coin ten times, where the probability of a head = 1/2.

b. X = number of heads from flipping two coins five times each, where the probability of a head for one coin = 1/2 and the probability of a head for the other coin = 1/4.

c. X = number of cities in which it will rain tomorrow among five neighboring cities located within 10 miles of each other.

d. X = number of children who will get the flu this winter in a kindergarten class with 20 children.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

the number 100 represents the number of trials in the experiment.

49/100 represents the experimental probability of the coin landing heads up.

step-by-step explanation: