154
1354
2027
4154
Correct answer is B
P(only one hit target) = P(Kofi not Ama) + P(Ama not Kofi)
P(Kofi not Ama) = P(Kofi and Ama') = 16×89=854
P(Ama not Kofi) = P(Ama and Kofi') = 19×56=554
P(only one hit target) = 854+554=1354
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