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A college offers 41 different subjects including 9 different languages - OCR - GCSE Maths - Question 14 - 2023 - Paper 4

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A college offers 41 different subjects including 9 different languages. Students are asked to choose one subject from Option A, one subject from Option B and one sub... show full transcript

Worked Solution & Example Answer:A college offers 41 different subjects including 9 different languages - OCR - GCSE Maths - Question 14 - 2023 - Paper 4

Step 1

Calculate Total Combinations

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Answer

To determine the total number of combinations of subjects chosen, we calculate:

extTotalcombinations=(extSubjectsfromA)imes(extSubjectsfromB)imes(extSubjectsfromC) =14imes12imes15=2520 ext{Total combinations} = ( ext{Subjects from A}) imes ( ext{Subjects from B}) imes ( ext{Subjects from C}) \ = 14 imes 12 imes 15 = 2520

Step 2

Calculate Combinations Without Any Language

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Answer

Next, we need to calculate the total combinations that do not include any languages.

  • For Option A (14 subjects, 2 languages): Non-language subjects = 14 - 2 = 12

  • For Option B (12 subjects, 3 languages): Non-language subjects = 12 - 3 = 9

  • For Option C (15 subjects, 4 languages): Non-language subjects = 15 - 4 = 11

Thus, the combinations without any language would be:

extCombinationswithoutanylanguage=12imes9imes11=1188 ext{Combinations without any language} = 12 imes 9 imes 11 = 1188

Step 3

Calculate Combinations With At Least One Language

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Answer

Now, we find the combinations that include at least one language by subtracting the combinations without any language from the total combinations:

extCombinationswithatleastonelanguage=extTotalcombinationsextCombinationswithoutanylanguage =25201188=1332 ext{Combinations with at least one language} = ext{Total combinations} - ext{Combinations without any language} \ = 2520 - 1188 = 1332

Step 4

Calculate the Proportion

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Finally, we compute the proportion of combinations that include at least one language:

ext{Proportion} = rac{ ext{Combinations with at least one language}}{ ext{Total combinations}} \ = rac{1332}{2520} = rac{111}{210} ext{ (after simplification)}

Thus, the proportion of subject combinations that include at least one language is

rac{111}{210}.

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