From statement I: No proper information is given. From statement II: No proper information is given. From I and II together, it is clear that there are 20 persons sitting in the row. 
The probability of getting a total of 7 on two dice thrown together is:
Which of the following options is correct when data is classified on the basis of attributes?
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...
60% of the employees of a company are college graduates. Of these, 10% are in sales. Of the employees who did not graduate from college, 80% are in sal...
If Z1, Z2,…Zn are n independent standard normal variates, then Σni=1 Z2i will follow:
If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:
The mode (correct to two decimal places) for the given data is:
The average working hours per month of the staff aged over 50 years in a factory were 160 and that of the staff aged under 50 years were 210. The mean ...
If the first, second, and third moment about the origin are 2, 8, and 18 respectively, then third moment about mean is
