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Mathematics
11.02.2020 00:17
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To celebrate the first day of school, Adriana brought in a tray of caramel brownies

To celebrate the first day of school, Adriana brought in a tray of caramel brownies and walnut brownies. She brought 88 brownies in all. 22 of the brownies were caramel. What percentage of the brownies were caramel?To celebrate the first day of school, Adriana brought in a tray of caramel brownies and walnut brownies. She brought 88 brownies in all. 22 of the brownies were caramel. What percentage of the brownies were caramel?
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spearjj
spearjj
4,9(62 marks)

Step-by-step explanation:

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AleOfficial101
AleOfficial101
4,5(52 marks)

See explanation

Step-by-step explanation:

There are 14 green, 12 orange and 19 purple tennis balls in the bag,

14+12+19=45 balls in total.

A. The propbabilities that

a randomly chosen ball from the bag is green =\dfrac{14}{45};

a randomly chosen ball from the bag is orange =\dfrac{12}{45}=\dfrac{4}{15};

a randomly chosen ball from the bag is purple =\dfrac{19}{45}.

A probability model for choosing a tennis ball from the bag is

\begin{array}{lccc}\text{Ball}&\text{Green}&\text{Orange}&\text{Purple}\\ \\\text{Probability}&\dfrac{14}{45}&\dfrac{4}{15}&\dfrac{19}{45}\end{array}

B. Suppose a tennis ball is randomly selected and then replaced 75 times. You can expect that orange ball appear

\dfrac{4}{15}\times 75=4\times 5=20 times

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