<?xml version="1.0" encoding="windows-1251"?>
<task title="Øàðû 1á2ñ1÷-(1á1ñ)">
<description>
<![CDATA[Â óðíå íàõîäèòñÿ 1 áåëûé, 2 ñèíèõ, 1 ÷åðíûé øàð. Ñ êàêîé âåðîÿòíîñòüþ èç óðíû ìîæíî îäíîâðåìåííî âûòàùèòü 1 áåëûé è 1 ñèíèé øàð?
]]><imgs><img>1w2bl1b-(1w1bl).PNG</img>
</imgs></description>
<description-params>
	<param name="length1">
 		<value>4</value>
 	</param>
	<param name="toFind">
 		<value>2</value>
 	</param>
</description-params>
 <mathDescription>
 <sourceSet> 
 <set type="CombinationSet" length="${toFind}"> 
	<set type="EnumerationSet">
    <constElement>0</constElement>    <constElement>2</constElement>    <constElement>2</constElement>    <constElement>1</constElement>	</set>
	</set>
</sourceSet>
<verifier type="SimpleVerifier" normalize="C(${length1} ,${toFind})">
<function type="And">
<constElement>1</constElement>
<function type="Like">
<current-set-element/><constElement><constElement>0</constElement>
<constElement>2</constElement>
</constElement>
</function>

</function>
</verifier> </mathDescription>
 </task>