In a class of 50 students, 33 are Telugu speaking, 15 are Urdu speaking and 9 speak neither Telugu nor Urdu. How many students are both Telugu speaking as well as Urdu speaking?
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1 mark, −0.33MathematicsCombinatorics and countingInclusion-exclusion and complementary countingModerateabout 1 min
UoH 2015 Question 86: Combinatorics and counting
Answer and worked solution
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Combinatorics and counting has come up 24 times in 5 exams since 2009.
What this question tests
This question is on Inclusion-exclusion and complementary counting, part of Combinatorics and counting in Mathematics.
Counting by adding and removing overlaps, or by counting what is not wanted.
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Question from the UoH 2015 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.