7. At a tuition centre, some teachers teach English while others teach mathematics or both subjects. Fifty-two teachers teach English and 38 teachers teach mathematics. Of these, 22 teachers teach both subjects. How many teachers are there in the tuition centre?
7. At a tuition centre, some teachers teach English while others teach mathematics or both subjects. Fifty-two teachers teach English and 38 teachers teach mathematics. Of these, 22 teachers teach both subjects. How many teachers are there in the tuition centre?
Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 40SE: A family consisting of 2 parents and 3 children is to pose for a picture with 2 family members in...
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