The variance of a constant 'x' is
The variance of a constant 'x' is 0. This is because the variance is a measure of how much a random variable deviates from its mean, and if 'x' is a constant, it has no variability, resulting in a variance of 0.
The difference between a number and its four – seventh is 60. What is the number?
A and B have 6 and 7 pieces of bread respectively. They share their food with C, who pays them Rs 42 for the received breads. If each of them has equal ...
The ratio of two natural numbers 'u' and 'v' is 3:4, respectively. When 12 is added to 'u' and 8 is subtracted from 'v', the ratio of 'u' to 'v' becomes...
If 193 × 199 + x makes the perfect square. Find the value of x
The difference between the value of the number increased by 20% and the value of the number decreased by 30% is 120. Find the number.
A lending library has a fixed charge for the first 7 days and an additional charge for each day thereafter. Sahil paid Rs . 215 for a book kept for 15 ...
Albela Sells Chocolates in the packs of 6 chocolates, 12 chocolates, 18 chocolates and 24 chocolates etc, but the rate is necessarily uniform. One day B...
In a group of three numbers first is double of second and half of third. The average of three numbers is 42. Find the difference between the first numbe...
There are three numbers 'm', 'n' and 'o' (m < n < o) such that 'n' is equal to the average of 'm' and 'o'. 60% of 'o' is equal to 'm' and the difference...
Find the average of first 7 whole numbers.
