JEE MATHEMATICS MCQ: STATISTICS

1 Medium

1 of 1

Application +4 | -1

The average salary of male employees in a firm was
Rs 5200 and that of females was 4200. The mean salary of all the employees was Rs 5000. The percentage
of male employees is

View answer and explanation

Correct option: A

Option A (80) is correct because, by setting up an equation for the mean salary and solving for the ratio of male to female employees, we can find the percentage of male employees.

More Questions from STATISTICS

Practice All Chapter MCQs →

If the mean of a set of observations

{x_1},{x_2}, \ldots ,{x_n}

\bar X,

then the mean of the observations

{x_i} + 2\;i;i = 1,\;2, \ldots ,n

is The sum of 10 items is 12 and sum of their squares is 18 , then standard deviation will be In a family, there are 8 men, 7 women and 5 children whose mean ages separately are respectively 24,20 and 6 years. The mean age of the family is The mean and variance of seven observations are 8 and 16, respectively. If 5 of the observations are 2, 4, 10, 12, 14, then the product of the remaining two observations is

1,3,5, x, y

are 5 observations. Mean of these observations is 5 and variance is 8. Sum of the cubes of the two missing number equals: If s.d. of a set of observations is 8 and if each observation is divided by

-2,

the s.d. of the new set of observations will be