QUESTION IMAGE
Question
a cooler contains 100 ice cream bars. there are 20 vanilla bars, 10 mint chocolate chip bars, 40 chocolate bars, and 30 rocky road bars. if one bar is selected at random from the cooler, determine the probability that the bar selected is vanilla, rocky road, or mint chocolate chip.
the probability that the bar selected is vanilla, rocky road, or mint chocolate chip is (type an integer or a simplified fraction.)
<pre_analysis>
{
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</pre_analysis>
<reasoning>
Identify the total number of outcomes
\[
N = 100
\]
Calculate the number of favorable outcomes
\[
F = 20 \text{ (Vanilla)} + 30 \text{ (Rocky Road)} + 10 \text{ (Mint Chocolate Chip)} = 60
\]
Compute and simplify the probability
\[
P = \frac{60}{100} = \frac{3}{5}
\]
</reasoning>
<answer>
The probability that the bar selected is Vanilla, Rocky Road, or Mint Chocolate Chip is <blank>\(\frac{3}{5}\)</blank>.
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Statistics",
"Theoretical Probability"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Theoretical Probability",
"Addition Rule for Probability",
"Fraction Simplification"
],
"new_concepts": [],
"current_concepts": [
"Theoretical Probability",
"Addition Rule for Probability",
"Fraction Simplification"
]
}
</pre_analysis>
<reasoning>
Identify the total number of outcomes
\[
N = 100
\]
Calculate the number of favorable outcomes
\[
F = 20 \text{ (Vanilla)} + 30 \text{ (Rocky Road)} + 10 \text{ (Mint Chocolate Chip)} = 60
\]
Compute and simplify the probability
\[
P = \frac{60}{100} = \frac{3}{5}
\]
</reasoning>
<answer>
The probability that the bar selected is Vanilla, Rocky Road, or Mint Chocolate Chip is <blank>\(\frac{3}{5}\)</blank>.
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Statistics",
"Theoretical Probability"
]
}
</post_analysis>