need help with finite math

Question

a Jar contains 2 nickles and 4 quarters. You reach in and randomly choose 2 coins. Let x represent the value of 2 coins in cents. Find the value of x. I need to figure out how to make a table as well. I think I have it started, just not sure if I finished it correctly. I got the answer as 30.9523

Answer 1

Table assuming no replacement

 

Coins      Value

N₁N₂         10¢

N₁Q₁         30¢

N₂Q₁         30¢

N₁Q₂         30¢

N₂Q₂         30¢

N₁Q₃         30¢

N₂Q₃         30¢

N₁Q₄         30¢

N₂Q₄         30¢

Q₁Q₂          50¢  

Q₁Q₃        50¢

Q₁Q₄        50¢

Q₂Q₃        50¢

Q₂Q₄        50¢

Q₃Q₄        50¢