Summarize categorical data for two categories

A random sample of 200 teenagers participated in a taste test.  Each teenager sampled four choices of fruit drink (labeled "A", "B", "C", and "D"), and then were asked to pick a favorite.  The table shows the results of this taste test.

Based on the information given, which of the given statements are true?
A.)  40% of the participants were girls
B.)  70% of the participants preferred "A"
C.)  20/120 of the boys preferred "D"
D.)  10/35 of the participants who preferred "B" were girls
E.)  The proportion of boys who preferred "C" is equal to the proportion of girls who preferred "C"

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Begin checking each statement for being true or false.

A.) 40% of the participants were girls
 200
x 0.4
-------
 80  
A.) is true

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B.)  70% of the participants preferred "A"
70 out of 200 preferred "A"
= 70/200
= 0.35   {divided}
 = 35% of the participants preferred "A"   {changed decimal to percent}
B.) is false

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C.)  20/120 of the boys preferred "D"
looking at the chart 20 out of 120 boys did prefer "D"
C.) is true

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D.)  10/35 of the participants who preferred "B" were girls
Looking at the chart, 10/35 of the participants who preferred "B" were girls
D.) is true

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E.)  The proportion of boys who preferred "C" is equal to the proportion of girls who preferred "C"
30/120 boys preferred "C" and 30/80 girls preferred "C"
E.) is false

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