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I. 63x² + 146x + 80 = 0 63x² + 90x + 56x + 80 = 0 9x(7x + 10) + 8(7x + 10) = 0 (9x + 8) (7x + 10) = 0 ∴ x = (-8)/9, (-10)/7 II. 42y² + 109y + 70 = 0 42y² + 60y + 49y + 70 = 0 6y(7y + 10) + 7(7y + 10) = 0 (6y + 7) (7y + 10) = 0 ∴ y = (-7)/6, (-10)/7 Hence, relationship cannot be established between x and y
The purchasing power of money is equal to:
For the following frequency distribution
Class : 3-5 5-7 7-9 ...
For a group of 100 students, the mean and standard deviation of scores were found to be 30 and 5 respectively. Later on it was discovered that the scor...
Which option is WRONG?
The following observations 14, 19, 17, 20, 25 constitute a random sample from an unknown population with mean u and standard deviation σ.
The...
The grouped data for the observations are
Class: 1-3 3-5 5-7
The Excess Kurtosis of the Geometric distribution with parameter p is:
If xi | fi , i = 1,2,...n is a frequency distribution with standard deviation 15 and mean 30, the coefficient of variation will be equal to: