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

0.139
0.167
0.306
0.421

Which of the following would be considered a nec code violation in regards to the installation of luminaires? a. an outdoor lighting fixture mounted to a tree b. a five-pound, 12-inch diameter light fixture supported by the screw shell of the lampholder c. florescent lay-in fixtures attached to the framing sections of a suspended ceiling with sheet-metal screws d. track lighting over a sink, 2 feet from a bathtub