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The mean age of a combined group of men ...

The mean age of a combined group of men and women is 25 years. If the mean age of the group of men is 26 years and that of group that of women is 21 years, then find the percentage of men and women in the group.

A

60, 40

B

80, 20

C

20, 80

D

40, 60

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-MEASURES OF CENTRAL TENDENCY-Exercise
  1. If a variable takes value 0,1,2,3,....,n with frequencies 1,C(n,1),C(n...

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  2. The weighted mean of the first n natural numbers whose weights are equ...

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  3. The mean of n observations is X . If the first item is increased by...

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  4. If bar X1 and bar X2 are the means of two series such that bar X1 lt...

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  5. The mean of the series x1, x2,...xn is barX. If x2 is replaced by lamb...

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  6. The mean income of a group of workers is bar(X) and that of another gr...

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  7. If the variable takes values 0,1,2,…, n with frequencies q^(n),""^(n)C...

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  8. The AM of n observations is M. If the sum of n-4 observations is a, ...

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  9. The sum of squares of the deviation of the values of the variable is w...

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  10. If each of n numbers x(i)=i, is replaced by (i+1)x(i), then the new me...

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  11. The mean age of a combined group of men and women is 25 years. If the ...

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  12. Iin a moderately skewed distribution the values of mean and median ar...

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  13. One of the methods of determining mode is (a) Mode = 2 Median 3 Mean ...

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  14. The positional average of central tendency is

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  15. For dealing with qualitative data the best average is:- a) AM b) GM ...

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  16. If a variable takes discrete values x+4, x-(7)/(2), x-(5)/(2), x-3, x-...

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  17. Which one of the following is not a measure of central value: (a) Me...

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  18. If y = f(x) be a monotonically increasing or decreasing function of ...

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  19. The median can graphically be found from

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  20. If in a moderately asymmetrical distribution the mode and the mean of ...

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