PYQ Browser

The scores of 16 students in a test are as follows: 19, 4, 17, 7, 15, 2, 18, 11, 15, 17, 19, 4, 3, 2, 6, 9. What is the difference between their arithmetic mean and the median ?

Two unbiased dice, each marked 1 to 6 on their faces, are rolled simultaneously. What is the probability that the sum of the outcomes on the top faces of both dice is 7 or 10 ?

74. Suppose that x and y are distinct variables that take values from {l, 2, 3, 4, 5, 6}. What is the probability that the value of the expression xy+ x + y is even?

There are four identically sized and shaped balls in a box, with only its top open. Each ball is of a different colour, these being: Green, Red, White and Blue, only one ball of each colour. Without looking into the box, one ball is randomly picked out and its colour is noted; then it is returned to the box. What are the chances that, in two successive draws, one may get the white ball and the red ball - in whichever order?

The mean and standard deviation of a set of 16 non-zero positive numbers in an observation are 26 and 3.5 respectively. The mean and standard deviation of another set of 24 non-zero positive numbers are 29 and 3, respectively.

The mean and standard deviation of their combined set of observations will respectively be

Which of the following is not an absolute measure of dispersion?

Three sets of data on comparable situations are available as under. Considering all the data sets together, the overall mean value would be:

40. A dice is thrown two times. The number of ways that the number appearing on the first throw is not less than that on the second throw is: