<PRE><B>Question 387674</B>
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 13. If 260 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects? 

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2 to 13 is the same as 2x to 13x
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Equation:
2x+3x = 260
5x = 260
x = 52
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2x = 104 will encounter undesirable side effects.
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Cheers,
Stan H.</PRE>