Let the distance from B to C be xkm ∴ A to C = 2x/5 km Upstream speed = 32 – 8 = 24 km/hr Downstream speed = 32 + 8 = 40km/hr Now, 2x/(5 × 24) + x/40 = 15 2x/120 + x/40 = 15 (2x + 3x)/120 = 15 x = 360 km
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:
The probability of getting 9 cards of the same suit in one hand at a game of bridge is
The mean deviation and coefficient of mean deviation of 5 observation are 1.2 and 0.4. If the sum of the first four terms is 10, then the fifth term is...
Statistics is not applicable to ________ observation.
The mean and median of the distribution is 12 and 15. Then the mode equals to:
Completely randomized design is based on the principles of _________ and randomization only.
For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:
