In a school there are 20 teachers who te...

In a school there are 20 teachers who teach mathematics or physics. Of these, 12 teach mathematics and 4 teach both physics and mathematics. How many teach physics ?

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NCERT GUJARATI-SETS-MISCELLANEOUS EXERCISE ON CHAPTER 1

In a school there are 20 teachers who teach mathematics or physics. Of...
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Decide, among the following sets, which sets are subsets of one and a...
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In each of the following, determine whether the statement is true or f...
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In each of the following, determine whether the statement is true or f...
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In each of the following, determine whether the statement is true or f...
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In each of the following, determine whether the statement is true or f...
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In each of the following, determine whether the statement is true or f...
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In each of the following, determine whether the statement is true or f...
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Let A, B, and C be the sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C....
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Show that if A ⊂ B, then C – B ⊂ C – A.
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Assume that P ( A ) = P ( B ). Show that A = B
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Is it true that for any sets A and B, P ( A ) ∪ P ( B ) = P ( A ∪ B )?...
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Show that for any sets A and B, A = ( A ∩ B ) ∪ ( A – B ) and A ∪ ...
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Using properties of sets, show that A ∪ ( A ∩ B ) = A
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Using properties of sets, show that A ∩ ( A ∪ B ) = A.
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Show that A ∩ B = A ∩ C need not imply B = C.
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Let A and B be sets. If A ∩ X = B ∩ X = φ and A ∪ X = B ∪ X for some s...
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Find sets A, B and C such that A ∩ B, B ∩ C and A ∩ C are non-empty s...
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In a survey of 600 students in a school, 150 students were found to be...
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In a group of students, 100 students know Hindi, 50 know English and 2...
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In a survey of 60 people, it was found that 25 people read newspaper H...
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