Answer:
Event 1 < Event 3 < Event 4 < event 2
Step-by-step explanation;
To arrange the events from least probable to most probable, we first find their probabilities.
Event 1;
There are no white pens in box b; therefore, the probability of getting a white pen is 0%.
Event 2:
There are only orange and red pens in box A; therefore, the probability of choosing a red or an orange pen is 100%.
Event 3:
The probability of choosing an orange pen from box B is 7/13+7 x 100% = 35%
Event 4:
The probability of choosing a red pen from box A is
6 / 6+ 6 x 100% = 50 %
Therefore, the events when ordered from least likely to most likely are
Event 1 < Event 3 < Event 4 < event 2