Home
Class 10
MATHS
If n(AtimesB)=20 and n(A)=5 then n(B)=...

If `n(AtimesB)=20 and n(A)=5` then `n(B)=`

A

`10`

B

`5`

C

`4`

D

`100`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • NUMBER AND SEQUENCES

    SURA PUBLICATION|Exercise Unit test|12 Videos

  • RELATIONS AND FUNCTIONS

    SURA PUBLICATION|Exercise Unit Test|14 Videos

Similar Questions

Explore conceptually related problems

If n(AtimesB)=6 and A={1,3} , then n(B) is

If n(A)=p and n(B)=q then n(AtimesB) ____.

If n(A)=43, n(B)=51 and n(A cup B)=75, then n((A-B) cup (B-A))=

If n(A)=50, n(B)=35, n(A cap B)=5," then n(A cup B) is equal to .........."

If f: A to B is a bijective function and if n(A)=5 , then n(B) is equal to ____.

If n (A xx B) =24 and A = {1,3,5,7} then n (B) is

Let n(U)=700, n(A)=200, n(B)=300 and n(A cap B)=100, then n( A^(c)capB^(c) )=

If n(U)=70, n(A)=25, n(B)=30, n(A cap B)=5," then "n(A cup B)' is..........

If n (A) =5 and n(B ) =7 , then the number of relations on A xx B is

(i)If n(A)=25, n(B)=40, n(A cup B)=50 and n(B')=25," find "n(A cap B) and n(U) . (ii) If n(A)=300, n(A cup B)=500, n(A cap B)=50 and n (B')=350 , find n(B) and n(U) .

SURA PUBLICATION-ONE MARK QUESTIONS SET -Multiple Choice Question
  1. If a letter is chosen at random from the English alphabets {a, b,.., z...

    Text Solution

    |

  2. If {(a, 8), (6, b)} represents an identity functions then the values o...

    Text Solution

    |

  3. If n(AtimesB)=20 and n(A)=5 then n(B)=

    Text Solution

    |

  4. The next term of the sequences (3)/(16), (1)/(8), (1)/(12), (1)/(18),…

    Text Solution

    |

  5. In a G.P.t(2)=(3)/(5) and t(3)=(1)/(5). The the common ratio is .

    Text Solution

    |

  6. (x)/(x^(2)-25)-(8)/(x^(2)+6x+5) gives

    Text Solution

    |

  7. The LCM of 8x^(4)y^(2), 48x^(2)y^(4) is .

    Text Solution

    |

  8. Which of the following can be caluculated from the given matrices A=...

    Text Solution

    |

  9. In a given figure, ST||QR, PS=2 cm and QS=3 cm. Then the ratio of the ...

    Text Solution

    |

  10. The straight line given by the equation x=11 is

    Text Solution

    |

  11. The equation of a straight line passing through (5, 7) and is parallel...

    Text Solution

    |

  12. A tower is 60 m height. Its show is x metres shorter when the sun's al...

    Text Solution

    |

  13. The total surface area of a hemi-sphere is how much times the square o...

    Text Solution

    |

  14. If the mean and coefficient of variation of a data are 4 and 87.5 % th...

    Text Solution

    |

  15. The probability a red marble selected at random from a jar containing ...

    Text Solution

    |

  16. If n(AtimesB)=6 and A={1,3}, then n(B) is

    Text Solution

    |

  17. If f: A to B is a bijective function and if n(A)=5, then n(B) is equal...

    Text Solution

    |

  18. Euclid's division lemma states that for positive integers a and b, the...

    Text Solution

    |

  19. The value of (1^(3)+2^(3)+3^(3)+…+15^(3))-(1+2+3+…+15) is

    Text Solution

    |

  20. The solution of the system x+y-3z=-6, -7y+7z=7, 3z=9 is

    Text Solution

    |