For the following questions answer them individually
Arithmetic mean of 56, 57, 58, ..., 100 is:
The median of some observations is 12. If two additional observations 10, 15 are added to these observations. then the median of the new series
of observations is:
If the arithmetic mean of some observations is 26.5 and their median is 25.4. then their mode is:
Standard deviation of first 2n natural numbers is:
Forthe ten observations X1, X2, ......, X10 it is given that $$\sum_{i = 1}^{10} x_i = 12$$ and $$\sum_{i = 1}^{10} x_i^2 = 18$$ Then the standard deviation of the data is:
If the sum of the squares of the deviations of ranks of two students in seven subjects is 21. then the coefficient of rank correlation is:
A problem in mathematics is given to three students P, Q and R whose chances of solving it are $$\frac{1}{3}, \frac{1}{4}$$ and $$\frac{1}{2}$$ respectively. Then the probability that the problem will be solved is:
Four dice are thrown simultaneously. The probability that all of them show the same numbers is:
If two cards are drawn at randomfrom a well shuffled pack of 52 cards, then the probability of getting both cards from same suit is:
When two dice are rolled at random, then the probability of getting same prime number on both dice is