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For the following questions answer them individually
The mean of the marks scored by a student in the first five papers is 72. If the marks scored in the sixth paper are also included, then the mean decreases by 7. Then the marks obtained by that student in the sixth paper is
If 76 and 72 are the mode and median of a data respectively, then the mean of the data is
If the variance of $$x_{1},x_{2}, .... ,x_{50}$$, is 7, then the variance of $$4x_{1} + 5, 4x_{2} + 5, ... , 4x_{50} + 5$$ is
If $$(x_{i},y_{i}) = 1, 2, ......... , 9, 10$$ are the ranks of the variables X and Y respectively such that $$\sum (x_{i} - y_{i})^{2} = 30$$, then the rank correlation between the two variables is
A coin is tossed and die is cast. Whit is the probability of getting tail on the coin and at least 3 on the die?
A and B are two sets such that n(A) = 3 and n( B) = 2. If a relation from A to B is selected at random, what is the probability that the relation will be a function?
When two dice are thrown, the probability of getting 11 as the sum of the numbers shown on the dice is
Two events A and B have probabilities 0.25 and 0.5 respectively. The probability that both A and B occur is 0.14 What is the probability that, neither A nor B occurs?
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