Jon's office had already recycled 29 kilograms this year before starting the new recycling plan, and the new plan will have the
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Answer:
720
Step-by-step explanation:
I will use the following counting principle:
Product rule: if there are n ways of doing something, and m ways of doing another thing, there are n×m ways of doing both things.
First, we have to choose the 3 people that will be in the first row. This is a 3-element subset of the set of six people, therefore there are ways of doing this.
Now, we have to arrange the order of the 2 lrows. Each one has 3 people, so there are 3!=6 ways to form one rows. Hence, there are 3!²=36 ways of arranging the two rows.
By the product rule, there are 20×36=720 ways of arrange the officers.
, of the usual price is the savings .
<u>Step-by-step explanation:</u>
Here we have , At a hardware store, a tool set normally costs $80. During a sale this week, the tool set costs $12 less than usual. We need to find What percentage of the usual price is the savings . Let's find out:
Initially we have cost as $80 , in sale it is $12 less i.e.
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So , percentage of the usual price is the savings :
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Therefore , of the usual price is the savings .