निम्न प्रेक्षण 18 छात्रों के गणित की परीक्षा में प्राप्तांकों को दर्शाते है, इनका माध्य ज्ञात कीजिए -
45, 40, 50, 40, 60, 40, 50, 50, 70, 30, 20, 70, 50, 45, 30, 20, 70, 70

Range of data : 20,40,30,60,80,100,10,70 is

Range of data: 20,40,30,60,80,100,10,70 is:

Find the mean of the following data : 40, 50, 65, 70, 75

If U = {10, 20, 30, 40, 50, 60, 70, 80, 90} universal set. and A = {10, 20, 40, 60} B = {30, 40, 60, 80} C = {10, 30, 60, 90} find A'

If U = {10, 20, 30, 40, 50, 60, 70, 80, 90} universal set. and A = {10, 20, 40, 60} B = {30, 40, 60, 80} C = {10, 30, 60, 90} find (A')'

The daily wages of 30 workers (in Rs.) in a factory is given below. 40, 45, 35, 70, 60, 52, 49, 46, 65, 56, 60, 35, 45, 40, 50, 56, 57, 48, 55, 52, 50, 70, 75, 80, 50, 45, 52, 65, 72, 50. How many workers are earning less than Rs. 50 per day ?

Find the standard deviation for the following data: 10, 20, 30, 40, 50, 60, 70, 80, 90

If U = {10, 20, 30, 40, 50, 60, 70, 80, 90} universal set. and A = {10, 20, 40, 60} B = {30, 40, 60, 80} C = {10, 30, 60, 90} find (B - C)'

If U = {10, 20, 30, 40, 50, 60, 70, 80, 90} universal set. and A = {10, 20, 40, 60} B = {30, 40, 60, 80} C = {10, 30, 60, 90} find (A nn C)'

Find the standard deviation of the following set of numbers: 25, 50, 45, 30, 70, 42, 36, 48, 34, 50