Question
18 men, working 8 hours a day, can complete a task in 21
days. If a woman is 33(1/3)% less efficient than a man, how much time will it take for 24 women, working 6 hours a day, to complete the same task?Solution
Let the efficiency of a man be '3e' units/day. Efficiency of a woman = (2/3) X 3e = '2e' units/day Let the required time be 'T' days. So, 18 X 8 X 21 X 3e = 24 X 6 X T X 2e Or, 'T' = (63/2) = 31.5
For a distribution with mean, median, mode and standard deviation 25, 24, 26 and 5 respectively, Karl Pearson's coefficient of skewness equals to:
Identify, from the following, the moment used as a measure of skewness?
The mean deviation from an average A will be minimum, if A represents:
Second differencing in time series can help to eliminate which trend?
(I) Quadratic trend
(II) Linear trend
For completely randomized design for k treatments and n observations, yif = response from the jth unit receiving ith treatment, �...
If Arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y = 10 – 2x is:
With reference to analysis of variance. which of the following statements is/are correct?
(I) Change of origin will affect the value of F
...For two items, tea (1 kg) and sugar (1 kg), the prices in the year 2019 were ₹100 and ₹50, respectively, whereas the prices in the year 2020 were �...
The purchasing power of money is equal to:
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