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Eruein
03.08.2019 •
Mathematics
Benali's has a bag filled with marbles. there are 7 blue marbles and 1 green marble. she reaches into the bag and pulls out a marble. she keeps this marble out of the bag. then she reaches in again and pull out another marble. what is the probability that she selected a blue marble first and a blue marble second?
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Ответ:
The solution of the expression is![p(p-q)-q(q-p)=p^2-q^2](/tpl/images/0312/5707/3dcae.png)
Step-by-step explanation:
Given : Expression![p(p-q)-q(q-p)](/tpl/images/0312/5707/efcaa.png)
To find : Simplify the expression?
Solution :
Step 1 - Write the expression,
Step 2 - Apply distributive property,![a(b+c)=ab+ac](/tpl/images/0312/5707/d92c3.png)
Step 3 - Add like terms,
Therefore, The solution of the expression is![p(p-q)-q(q-p)=p^2-q^2](/tpl/images/0312/5707/3dcae.png)