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If n(A )= 20 n(A cap B) = 10,and n(A cup...

If n(A )= 20 `n(A cap B)` = 10,and `n(A cup B)=70`then find n(B).

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PEARSON IIT JEE FOUNDATION-EQUATIONS AND THEIR APPLICATIONS-Level 3
  1. If n(A )= 20 n(A cap B) = 10,and n(A cup B)=70then find n(B).

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  2. The present age of a man is seven times the present age of his son. Tw...

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  3. Th present age of A is thrice that of B. Five years from now, A's age ...

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  4. The sum of the present ages of Ram and Shyam is 75 years. Ten years ag...

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  5. A road divider of certain length is painted one-sixth yellow, three-fi...

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  6. Mr Sumanth spends two-fifth of his salary on house rent and one-fouth ...

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  7. In a two-digit number, the units digit is 3 more than the ten's digit....

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  8. A number is added to two-third of itself, 1 is subtracted from the sum...

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  9. The present age of A is 4 years less than twice the present age of B. ...

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  10. A mother said that, her age is one year less than thrice her dauther's...

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  11. There are two numbers, the difference between them is equal to twice t...

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  12. A student painted a circular region of certain area such that 4//7th o...

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  13. In a two-digit number, tens digit is a multiple of the units digit. Th...

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  14. There are three house-hold articles. The cost of the first article is ...

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  15. In an isoceles triangle, the difference between one of the equal sides...

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  16. Mr Anthony travelled 4//9 of a cetain distance by bus, 1//3 by car, an...

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  17. Which of the following is a solution of (2x -5)/(3) gt (3x + 3)/(4) ?

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  18. The unit digit of a two-digit number is 6. If 9 is added to the number...

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  19. A purse contains a cetain number of coins fo denominations Re. 1 and 5...

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  21. Ten years ago, Mohan's age was 35 years less than twice his present ag...

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