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Let S={(a,b,c)inNxxNxxN:a+b+c=21,aleblec...

Let `S={(a,b,c)inNxxNxxN:a+b+c=21,aleblec}` and `T={(a,b,c)inNxxNxxN:a,b,c` are in A.P. }, where N is the set of all natural numbers. Then the number of elements in the set `SnnT` is

A

6

B

7

C

13

D

14

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2015-MULTIPLE CHOICE QUESTIONS
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  2. Let f(x) denote the fractional part of a real numbers x. Then the valu...

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  3. Let S={(a,b,c)inNxxNxxN:a+b+c=21,aleblec} and T={(a,b,c)inNxxNxxN:a,b,...

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  4. Let y=e^(x^(2)) and y=e^(x^(2))sinx be two given curves. Then the angl...

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  5. A person goes to office by car or scooter or bus or train, probability...

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  6. The value of int((x-2)dx)/({(x-2)^(2)(x+3)^(7)}^(1//3))is

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  7. In a triangle ABC, angleC=90^(@) , r and R are the in-radius and circu...

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  8. Let alpha,beta be two distinct roots of acostheta+bsintheta=c, where a...

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  9. For a matrix A((1,0,0),(2,1,0),(3,2,1)) if U(1),U(2) and U(3) are 3xx1...

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  10. Let f:RtoR be differentiable at x=0. if f(0)=0 and f'(0)=2 , then the ...

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  11. If x and y are digits such that 17!""=3556xy428096000, then x+y equals

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  12. Let f:NtoR be such that f(1)=1 and f(1)+2f(2)+3f(3)+.........+nf(n)=n(...

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  13. If 5 distinct balls placed at random into 5 cells, then the probabilit...

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  14. A survey of people in a given region showed that 20% were smokers. The...

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  15. If cos x and sin x are solutions of the differential equation a(0)(d^(...

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  16. Which of the following statements is /are correct for 0ltthetalt(pi)/(...

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  17. Which of the following is /are always false?

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  18. If the straight (a-1)x-by+4=0 is normal to the hyperbola xy=1 then whi...

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  19. Let f be any-continuously differentiable function on [a,b] and twice d...

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  20. A relation rho on the set of real number R is defined as follows : xrh...

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