Question 471355

a)
number of cards which is  eight or  seven = 4*2 = 8

 probability of randomly selecting an eight or a seven = 8/52

b)
number of cards which is eight or seven or two = 4*3 = 12

probability of randomly selecting an eight,seven or two= 12/52

 
c) number of cards which is seven or diamond  = 13+ 3*1 = 16 

 probability of randomly selecting a seven or diamond = 16/52


if any doubt, please contact..