Homework Answers
Answer:
a).
The probabilities must satisfy
The probability of each outcome is between 0 and 1 inclusive.
The probabilities of all the outcomes add up to 1.
All given probabilities are between 0 and 1.
=
0.30+0.08+0.02+0.03+0.57 = 1
Sum of the probabilities =1.
Therefore this is a legitimate probability model.
b).
P(other than English) = 0.30+0.08+0.02+0.03
=0.43
c).
P( French,German,Spanish) = 0.30+0.08+0.02
= 0.40
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