Validate the probability distribution table where X = $ profit and P(x) = probability of earning that profit then answer questions 18 and 19.

X

0

50

100

150

200

P(x)

0.17

???

0.28

0.18

0.12

What is the probability of earning at most $100? __________

Let a random variable representing the sum of trials. Then is a binomial random variable if all of the following are satisfied EXCEPT: __________

a.the trials are independent

b., the probability of "success" on any trial is the same for all trials

c.each trial has exactly two possible outcomes

d.the number of trials is infinite