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There are 20 students in a Chemistry cla...

There are 20 students in a Chemistry class and 30 students in a Physics class. Find the number of students which are either in Physics class or Chemistry class in the following case : the two classes meet at different hours and ten students are rolled in both the subjects.

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MODERN PUBLICATION-SETS-EXERCISE
  1. There are 20 students in a Chemistry class and 30 students in a Physic...

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  2. Which of the following are sets ? Justify your answer. The collection ...

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  3. Which of the following are sets ? Justify your answer. The collection ...

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  4. A team of good hockey players of the world is a set or collection?

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  5. The collection of all students in your class is set or collection

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  6. Which of the following are sets ? Justify your answer. The collection ...

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  7. Which of the following are sets ? Justify your answer. A collection of...

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  8. Which of the following are sets ? Justify your answer. The collection ...

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  9. Which of the following are sets ? Justify your answer. The collection ...

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  10. Which of the following are sets ? Justify your answer. A collection of...

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  11. Let A = {1, 2, 3, 4, 5, 6}. Insert the appropriate symbol in or notin ...

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  12. Let A = {1, 2, 3, 4, 5, 6). Insert the appropriate symbol in or notin ...

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  13. Let A = {1, 2, 3, 4, 5, 6). Insert the appropriate symbol in or notin ...

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  14. Let A = {1, 2, 3, 4, 5, 6). Insert the appropriate symbol in or notin ...

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  15. Let A = {1, 2, 3, 4, 5, 6). Insert the appropriate symbol in or notin ...

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  16. Let A = {1, 2, 3, 4, 5, 6). Insert the appropriate symbol in or notin ...

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  17. Write the following set in roster form: A = {x : x is an integer and -...

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  18. Write the following set in roster form: B = {x : x is a natural number...

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  19. Write the following set in roster form: C = {x : x is a two-digit natu...

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  20. Write the following set in roster form: D = {x : x is a prime number w...

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  21. Write the following set in roster form: E = The set of all letters in ...

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