Question

4
The marks obtained by so students in tist were
13, 17, 11, 5, 8, 16, 11, 14, 13, 12, 18, 11, 9, 6, 8, 17, 21, 22, 7, 6.
(i) sind the mean marks per student.
(ii) If extra smarks are given to each student, show
that mean marks also increased by s.
(iii) If a marks are deducted from each students,
show that the mean marks are also reduced by 2.
(iv) If marks of each student be doubted, then show
that the mean marks are also doubled.
5
6​

Answer 1

Answer:

the mean of given observations is 11.9