The mean of a frequency distribution is 7 and Σfx = 140, then find the value of Σf

State True or False: The average of n numbers is x̄. If the sum of first (n−1) numbers is K, then nth number is (n−1) x̄ + K.

If A and M be the arithmetic mean and median of first ten natural numbers, then relation between them will be - (a) A > M (b) A < M (c) A = (d) A = M

The age of 100 persons present in a workshop is given in the following table. Find the average age of 100 people (by any method): Age Group Number of People 10 - 20 8 20 - 30 12 30 - 40 20 40 - 50 22 50 - 60 18 60 - 70 20

Construct the table of cumulative frequency (greater than type) and draw the ogive from the following frequency distribution : Class Frequency 0 - 10 7 10 - 20 10 20 - 30 23 30 - 40 50 40 - 50 6 50 - 60 4

Find the median of the data from the following distribution. Marks Obtained No. of Students Less than 10 8 Less than 20 15 Less than 30 29 Less than 40 42 Less than 50 60 Less than 60 70

Find the mode from the following data. Class Interval Frequency 0 - 5 2 5 - 10 6 10 - 15 10 15 - 20 16 20 - 25 22 25 - 30 11 30 - 35 8 35 - 40 5

Mode = 2 × Median – 3 × Mean.

x is the mean of (p + q) numbe ₹ If y be the mean of p numbers, then mean of remaining q numbers is ______.

If 6, 8, 10, 12, 13, x are in increasing order and their mean and median are equal, then find the value of x.

State True or False: The Mode of the data 5, 2, 4, 3, 5, 2, 5, 2, 5, 2 is 2.

The median of the numbers 8, 15, 10, 11, 7, 9, 11, 13 and 16 is _____.