Three identical chips, each with 0 on one side and 1 on the other, are to be tossed simultaneously.
a. writes the sample space.
b. what is the probability of observing the sum of the face-up numbers to equal to 2?
c. What is the probability of observing the sum of the face up numbers to be at least 1?
d. what is the probability of observing the sum of the face up numbers equal to 2.5?