Q An experiment involves 3 seedlings in a yard.Each of the
Seedlings has independent chance to survive (S) or not to survive(N)
while the probability that each seeding will
survive
0.75. Let a random variable x be the number of surviving
trees after one year of planting
a)construct a probability distribution for this experiment?
b) Hence
, determine the expected value of the random
variable x

The correct answer is:  [B]:  " True ".

Note:  From visual inspecton of the graph shown — [Note:  all images attached refer to the same graph.] :
 
→  We can see that when "x = -2"  ;  there is only one value for "y" ;  and then the "line" of the graph stops for any coordinate corresponding to any "x-value" LESS THAN "-2" ; 

 →  and that there are corresponding "y-coordinates" corresponding to any "x-value that is equal to "-2" and "GREAT THAN  "-2" .