Question

15 students of government school spend following numbers of hours in a month for doing their street cleaning 25,15,20,20,9,20,25,15,7,13,20,12,10,15,8
1)find mean,median,mode of data
2)which value is depicted from above data

Answer 1

Mean of the marks

addition of data ÷no of students

therefore

$234 \div 15 = 15.6$

is the mean

The number in the center of the data is median

Median of class is 15

The number repeated maximum times is mode

Mode of class is 20.

Hope it help.

Answer 2

we have

25,15,20,20,9,20,25,15,7,13,20,12,10,15,8

Mean=no.of observation/total no.of observation

no. of observation =25,15,20,20, 9,20,25, 15,7,13,20,12,10,15,8

no.of observation =234

total no. of observation = 15

Mean= no. of observation / total no.of observation

Mean=234/15

Mean=226.53 answer

Median=(n+1)th/2

=(15+1)th/2

=8th

=15 ans

Mode=most repeating term

=20 ans