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Relations and Functions
400 patients in a hospital were investigated for kidney and lung disorders. It was found that 240 of them had kidney disorder, 80 had lung disorder and 40 of them had both. Find the number of patients who had.
(a) at least one of the two disorders.
(b) kidney disorder but not the lung disorder
(c) lung disorder but not the kidney disorder
(d) neither of the two disorders.
sollution not provided
Ans. (a) 280 (b) 200 (c) 40 (d) 120
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Collection of ten most talented writers of India.
Collection of natural numbers between 100 and 200 (both inclusive).
Collection of all odd integers.
Collection of all divisors of 42.
Collection of beautiful girls in India.
Fill in the blanks in the following table:
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Numbers |
Closed under |
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Addition |
Subtraction |
Multiplication |
Division |
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Rational numbers |
Yes |
Yes |
No |
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Integers |
Yes |
No |
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Whole numbers |
... |
Yes |
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Natural numbers |
No |
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i9 + i19
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