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In a school, there are four sections of 40 students each in XI standard. In how many ways can a set of 4 student representatives be chosen, one from each section?

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To solve the problem of choosing a set of 4 student representatives from 4 sections, we can follow these steps: ### Step 1: Understand the problem We need to choose one student representative from each of the four sections, and each section has 40 students. ### Step 2: Calculate the choices for each section For Section 1, we can choose 1 student out of 40. This gives us 40 possible choices. For Section 2, we can also choose 1 student out of 40, giving us another 40 possible choices. For Section 3, similarly, we have 40 choices. For Section 4, we again have 40 choices. ### Step 3: Multiply the choices Since the choice from each section is independent of the others, we multiply the number of choices together: \[ \text{Total ways} = (\text{Choices from Section 1}) \times (\text{Choices from Section 2}) \times (\text{Choices from Section 3}) \times (\text{Choices from Section 4}) \] Substituting the values we have: \[ \text{Total ways} = 40 \times 40 \times 40 \times 40 \] ### Step 4: Calculate the total number of ways Calculating \(40^4\): \[ 40^4 = 40 \times 40 \times 40 \times 40 = 2560000 \] ### Final Answer Thus, the total number of ways to choose a set of 4 student representatives, one from each section, is **2,560,000**. ---

To solve the problem of choosing a set of 4 student representatives from 4 sections, we can follow these steps: ### Step 1: Understand the problem We need to choose one student representative from each of the four sections, and each section has 40 students. ### Step 2: Calculate the choices for each section For Section 1, we can choose 1 student out of 40. This gives us 40 possible choices. ...
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RS AGGARWAL-PERMUTATIONS-EXERCISE 8B
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  5. How many 8- digit telephone numbers can be constructed using the digit...

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  6. (a) A coin is tossed three times and the outcomes are recorded. How ma...

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  7. Find the number of different signals that can be generated by arrangi...

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  8. How many 4 - letter codes can be formed using the first 10 letters of ...

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  9. Given, A = {2, 3, 5} and B = {0, 1}. Find the number of different ord...

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  10. How many arithmetic progressions with 10 terms are there whose first t...

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  11. There are 6 items in column A and 6 items in column B. A student is as...

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  12. A mint prepares metallic calendars specifying months, dates and days i...

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  13. From among the 36 teachers in a school, one principal and one vice-pri...

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  14. A sample of 3 bulbs is tested. A bulb is labelled 'G' if it is good an...

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  15. For a set of five true or false questions, no student hs written the a...

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  16. In how many ways can the following prizes be given away to a class of ...

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  17. Find the total number of ways of answering 5 objective-type questions,...

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  18. A gentleman has 6 friends to invite. In how many ways, can he send inv...

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  19. In how many ways 6 rings of different types can be worn in 4 fingers?

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  20. In how many can 5 letters be posted in 4 letter boxes?

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