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Let number of 10 paisa, 20 paisa and 50 paisa coins be ‘8x’, ‘9x’ and ‘10x’, respectively. ATQ, (0.1 × 8x) + (0.2 × 9x) + (0.5 × 10x) = 38 Or, 0.8x + 1.8x + 5x = 38 Or, 7.6x = 38 So, x = 5 So, number of 20 paisa coins = 9x = 45 Therefore, required number of coins = 0.8 × 45 = 36
Let MSA defines mean sum of squares due to factor A and MSE defines mean sum of squares due to error. If the null hypothesis of ANOVA for one way class...
If Arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y = 10 – 2x is:
If the mean and variance of a binomial distribution are 5 and 4, respectively, then the value of n is:
If the difference between the rank of the 4 observations are 2.5, 0.5, -1.5, -1.5, then Spearman's rank correlation coefficient equals to:
By the method of moving averages, the seasonal index for four quarters equals to:
X and Y are independent normal variables with mean 50 and 80 respectively and standard deviation as 4 and 3 respectively. What is the distribution o...
If each observation in a data set for number of employees in different divisions is doubled then the coefficient of quartile deviation:
