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In how many ways in which an examiner ca...

In how many ways in which an examiner can assign 30 marks to 8 questions, giving not less than 2 marks to any question.

A

11

B

`""^(21)C_7`

C

`18`

D

235

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The correct Answer is:
B
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Directions: In a Mathematics exam of 50 marks, there are five questions of 1 mark each, fifteen questions 2 mark each and 3 questions of 5 mark each. Given below is a table that shows number of correct answers of some students in different categories and then total marks out of 50. Some fields have been left as empty and then respective values needs to be calculated if the need arises. Based on this information, answer the questions that follow. How many questions of 2 marks have been answered correctly by James and Mark together?

ARIHANT SSC-PERMUTATIONS & COMBINATIONS -EXERCISE (LEVEL-2)
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  3. In how many ways in which an examiner can assign 30 marks to 8 questio...

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  4. The exponent of 3 in 331! is :

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  7. The number of ways in which 4 pictures can be hung from 6, picture nai...

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  12. The number of all the possible selections which a student can make for...

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  13. The number of ways in which a team of 11 players can be selected from ...

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  14. There are 10 lamps in a hall. Each one of them can be switched on i...

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  15. How many 10 digits numbers can be formed by using the digits 2 and 3?

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  16. If 35% of a number is 12 less than 50% of that number, then the number...

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  17. The sum of the divisors of 2^3 .3^4 .5^2 is:

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  18. The number of ways of selecting 10 balls from unlimited number of red,...

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  19. If 10 objects are arranged in a row, then the number of ways of select...

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