Which of the following measures of dispersion is based on the variance of a dataset?
The standard deviation is based on the variance of a dataset, and it is calculated as the square root of the variance.
The total of the current ages of Aarav, Bishnu, Chinky, and Danny is 94 years. Chinky's present age is 60% of Danny's present age and 50% more than Aara...
The present age of A is double of B's present age. C's present age is 3/5th of A's present age. Average age of A, B and C is 28 yrs. Find the present ag...
12 years ago from now, ratio of ages of ‘R’ and ‘L’ was 3:5, respectively. If ‘L’ is 8 years elder to ‘R’, then what will be the age of ...
The combined average age of M, F, and S was 54 years when S got married. After 6 years, an infant was born. The average age of the family, 12 years post...
P says to Q “I am four times as old as you were when I was as old as you are”. The difference between their ages is 15 years. Find the sum o...
The ratio of the present ages of ‘A’ and ‘B’ is 5:6, respectively. Three years hence from now, the age of ‘B’ will be 21 years. If the avera...
2 years ago, age of A and B was in the ratio 2:3. After 6 years, the ratio becomes 6:7. Present age of C is 6 years more than the present age of B. Find...
The current ages of 'Arjun' and 'Bhanu' are in the ratio of 3:2, respectively. 'Y' years ago, the age of 'Chetna' was 40% less than the age of 'Bhanu'. ...
P says to Q ‘’ I am thrice as old as you were when I was as old as you are’’. The sum of their ages is 100 years. Find the difference of their ...
Five years ago, the ratio of the age of Tarun to that of Ayush was 6 : 11. Umesh is 10 years older than Tarun. Umesh is ten years younger than Ayush. Wh...
