Question

The table gives a set of outcomes and their probabilities. Let A be the event "the outcome is greater than or equal to 4". Find P(A).
Outcome Probability
1 0.063
2 0.134
3 0.078
4 0.175
5 0.211
6 0.05
7 0.033
8 0.032
9 0.192
10 0.032

Answer 1

A = {4,5,6,7,8,9,10}, so P(A) = 0.175+0.211+0.05+0.033+0.032+0.192+0.032 = 0.725.

(Alternatively, 1 − P({1,2,3}) = 1 − (0.063+0.134+0.078) = 1 − 0.275 = 0.725.)