i am trying to push myself and learn these furTher exercises in my maths i would any appreciate any comments and help.

Question 1 what is probability u happens if n happens... P(U INTERSECTION N) / P(U)?

Question 2 probability of U or S happening in the sample space of UDP or 52 byte size packet? Let me think hmmm

450,000: UDP, 20% UDP 450,000 times 0.2 answr correct??

Question 3 pick at random packet and packet of size 52. 1million packet so (0.2*450,000)+(0.9*500,000) correct again?

Question 4 probabalility u happens given s happens and is type of UDP ok P(U intersection S) / P(U)?

Question 5 not of size 52 bytes and is UDP so probability of U given N oh ok.

P(U intersection N) / P(N) = (450,000 INTERSECTION (450,000 * 0.8)) / (450000*0.8+500,000 * 0.1)???

Sample size of anything is equal to 1.

Nevertheless i am not quite sure i am appreciating insight and help, thanks.