Home
Class 9
MATHS
The mean of 18,24,15, 2x+1 and 12 is 21....

The mean of 18,24,15, `2x+1` and 12 is 21. Find the value of x.

Text Solution

Verified by Experts

The correct Answer is:
`17*5`
Promotional Banner

Topper's Solved these Questions

  • MEAN AND MEDIAN

    ICSE|Exercise Exercise 19(B) |16 Videos

  • LOGARITHMS

    ICSE|Exercise EXERCISE 8(D)|22 Videos

  • MENSURATION (PLANE FIGURE)

    ICSE|Exercise TOPIC-3 (4 Marks Questions)|8 Videos

Similar Questions

Explore conceptually related problems

The mean of 2,12,4,9, 5 and 16 is x . The median of 4,3, x, x-1, 12 and 16 is y. Find the value of x and y.

Ten observations 6 , 14 , 15 , 17 , x+1 , 2x-13 , 30 , 32 , 34 and 43 are written in an ascending order. The median of the data is 24 . Find the value of x .

If x+1/x=12 , find the value of x-1/xdot

If 3x=12 , what is the value of (24)/(x) ?

If the mean of 26 , 19 , 15 , 24 , and x is x , then find the median of the data .

The median of the following observation 11, 12, 14, (x - 2), (x + 4), (x + 9), 32, 38, 47 arranged in ascending order is 24. Find the value of x and hence find the mean.

The median of the observation 11 ,\ 12 ,\ 14 ,\ 18 ,\ x+2,\ x+4,\ 30 ,\ 32 ,\ 35 ,\ 41 arranged in ascending order is 24. Find the value of x .

If 10y=7x-4 and 12x+18y=1 . Find the value of 4x+6y and 8y-x .

Find the value of x in 3x = 2x + 18

Find the mean of 5,6,17,8,9,15,23,18,10 and 24.

ICSE-MEAN AND MEDIAN-Exercise 19(C)
  1. The average of n numbers x(1),x(2),x(3) . . . . .. ,x(n) is A. If x(1)...

    Text Solution

    |

  2. The heights (in cm) of the volley-ball players from team A and term B ...

    Text Solution

    |

  3. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

    Text Solution

    |

  4. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

    Text Solution

    |

  5. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

    Text Solution

    |

  6. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

    Text Solution

    |

  7. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

    Text Solution

    |

  8. The mean of 18,24,15, 2x+1 and 12 is 21. Find the value of x.

    Text Solution

    |

  9. The mean of 6 numbers is 42. If one number is excluded, the mean of re...

    Text Solution

    |

  10. The mean of 10 numbers is 24. If one more number is included, the new ...

    Text Solution

    |

  11. The following observations have been arranged in acending order. If th...

    Text Solution

    |

  12. The following observations have been arranged in ascending order. If t...

    Text Solution

    |

  13. Find the mean of the following data : 30,32,24,34, 26,28, 30, 35, 33...

    Text Solution

    |

  14. Find the mean of the following data : 30,32,24,34, 26,28, 30, 35, 33...

    Text Solution

    |

  15. Find the mean and median of the data : 35, 48, 92, 76, 64, 52, 51, 6...

    Text Solution

    |

  16. The mean of x,x+2,x+4,x+6 and x+8 is 11, find the mean of the first th...

    Text Solution

    |

  17. Find the mean and median of all the positive factors of 72.

    Text Solution

    |

  18. The mean weight of 60 students in a class is 40 kg. The mean weight of...

    Text Solution

    |

  19. The average of n numbers x(1),x(2),x(3) . . . . .. ,x(n) is A. If x(1)...

    Text Solution

    |

  20. The heights (in cm) of the volley-ball players from team A and term B ...

    Text Solution

    |