<PRE><B>Question 78479</B>
The weather news says there is a 30% chance of rain this weekend. Make an area to represent all possibilities. Find the probability that it will rain.
The weekend is two days.
P(rain)=0.3
P(no rain)=0.7
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a. P(No days)=0.7^2 = 0.49
b. P(One day)=2C1(0.3)(0.7) = 2(0.21)=0.42
c. P(Two days)=0.3^2=0.09
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Cheers,
Stan H.</PRE>