To choose the two best, we have a target of two candidates, A & B
The first one chosen is either A or B, with a propability of 2/5.
The second one is the only interested candidate out of 4, so 1/4.
So probability of choosing the best two is 2/5*1/4=1/10.
Alternatively, use the combination formula,
P(AB in any order) = 5!/(2!3!)=120/(2*6)=1/10
or in general,
n choose r = nCr = n!/(r!(n-r)!)
The goods that are excludable are private goods and club goods. The correct answer to this question is option D.
The club goods are those goods that can be artificially scarce. These goods are non rival in nature but the excludability is quite high.
Private goods on the other hands are those goods that have their usage and consumption restricted to only one person or group.
Such goods can only be used by one party.
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explain how a command economista diferrs fron
