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if the mean of five observations x, x+2,...

if the mean of five observations x, x+2,x+4,x+6,x+8 is 13 , find the value of x and hence find the mean of the last three observations.

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The correct Answer is:
x=9,mean = 15
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RS AGGARWAL-MEAN , MEDIAN AND MODE OF UNGROUPED DATA -Exercise 18A
  1. The followings are the numbers of books issued in a school library dur...

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  2. The daily minimum temperature recorded ( in .^(@)F ) at a place durin...

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  3. if the mean of five observations x, x+2,x+4,x+6,x+8 is 13 , find the v...

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  4. The mean weight of 6 boys in a group is 48 kg. the individual weight o...

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  5. The mean of the marks scored by 50 students was found to be 39 later o...

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  6. The mean of 24 numbers is 35. if 3 is added to each number, what will ...

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  7. The mean of 20 numbers is 43. if 6 is subtracted from each of the numb...

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  8. The mean of 15 numbers is 27. if each number is multiplied by 4, what ...

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  9. The mean of 12 numbers is 40. if each number is divided by 8, what wil...

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  10. The mean of 20 numbers is 18. if 3 is added to each of the first ten n...

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  11. The mean of six numbers is 23. If one of the numbers is excluded , th...

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  12. The average height of 30 boys was calculated to be 150 cm. it was dete...

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  13. The mean weight of a class of 35 student is 45 kg. if the weight of th...

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  14. In a class there are 50 students. Their average weight is 45 kg. Wh...

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  15. The average weight of a class of 39 students is 40 kg. when a new stud...

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  16. The average weight of 15 oarsmen in a boat is increased by 1.6 kg when...

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  17. The mean of 8 numbers is 35. if a number is excluded then the mean is ...

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  18. The mean of 150 items was found to be 60. Later on, it was discoverved...

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  19. The average of 11 results is 60. If the average of first six result...

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  20. The mean 11 numbers is 42. if the mean of the frist 6 numbers is 37 an...

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