SOLUTION: Edwin and Derek are archers. The probability that Edwin successfully hits a target is 0.7. The probability that Derek successfully hits a target is 0.6. Whenever they both shoot at

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Question 281096: Edwin and Derek are archers. The probability that Edwin successfully hits a target is 0.7. The probability that Derek successfully hits a target is 0.6. Whenever they both shoot at a target, what is the probability that:
a) only one of them is successful
b) at least one of them is successful?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Prob that both will miss=0.3 * 0.4=.12
Prob that both will hit = 0.7 * 0.6 = .42
a) 1-(.42+.12)=.46 prob only one of them is successful.
b) 1-.12=.88 prob at least one is successful.
.
Ed