Geometric Random Variables Answers

Check all that apply. In a geometric setting,we count the number of successes among a fixed number of trials.we count the number of trials to obtain the first success.the trials must be binary and independent.the probability of success must be the same for each trial.we have a fixed number of trials.

If X is a geometric random variable for which we are counting the number of trials until the first success, what are the possible values of X?

Keisha decides to roll a number cube until she gets a 6. Let X = the number of rolls until she rolls a 6.What is the probability that Keisha gets her first 6 before her 3rd roll? Round to 3 decimal places.Recall: P(X = k) = (1 – p)k–1p

What is the mean of X?

What is the standard deviation of X?