Various approches to probability

The given table shows the number of students participating in various activities in a school. From the above information one student is chosen. Find the probability that the student participates in games.

The absolute term in P(x)=sum_(r=1)^(n)(x-(1)/(r))(x-(1)/(r+1))(x-(1)/(r+2)) as n approches to infinity is :

The absolute term in P(x) = sum_(r=1)^n (x-1/r)(x-1/(r+1))(x-1/(r+2)) as n approches to infinity is :

A biased die is tossed and the respective probabilities for various faces to turn up are {:("Face",:,1,2,3,4,5,6),("Probability",:,0.1,0.24,0.19,0.18,0.15,0.14):} If an even face has turned up, then the probability that it is face 2 or face 4, is

A biased die is tossed and the respective probabilities for various faces to turn up are {:("Face",:,1,2,3,4,5,6),("Probability",:,0.1,0.24,0.19,0.18,0.15,0.14):} If an even face has turned up, then the probability that it is face 2 or face 4, is