The probabilities for four different simple events are given. of the four, which is most likely to occur? a. 0.5 b. 0.9 c. 0.35 d. 0.0100

The one that is most probable is the one that  is most likely to happen, ie the one that is closes to having a 100% chance of happening

100%=1 so the number closes to 1 is the most likely
we can't have a probility of more than 1 so we can say that the greatest number is most likely

if we rank the numbers we get
0.9>0.5>0.35>0.00100

so the answer is B. 0.9 which is equivilent to an 90% chance of the event occuring