document.write( "Question 1121138: The probability of it raining tomorrow is 0.12. For the day after, the chance of it not raining is 0.85. By drawing a tree diagram, find the chance of it raining for at least one day out of the tw0 \n" ); document.write( "
Algebra.Com's Answer #736966 by Boreal(15235)\"\" \"About 
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Note: I edited the rain probability as 0.15, so the probability of one or the other added to 1.00\r
\n" ); document.write( "\n" ); document.write( "R=0.15-----R 0.15--0.0225(both days)
\n" ); document.write( "-----------NR0.85--0.1275 (1 day)
\n" ); document.write( "NR=0.85---R 0.12--0.1275 (1 day)
\n" ); document.write( "-----------NR 0.85--0.7225 (0 days)\r
\n" ); document.write( "\n" ); document.write( "The probability of at least one rainy day is 0.2775.\r
\n" ); document.write( "\n" ); document.write( "This is the same as 1- probability of no rain either day (0.7225).
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