Mathematics
Marks obtained (in mathematics) by 9 students are given below :
60, 67, 52, 76, 50, 51, 74, 45 and 56.
(a) Find the arithmetic mean.
(b) If marks of each student be increased by 4; what will be the new value of arithmetic mean?
Related Questions
The mean value of 15 numbers is 20. If one of these numbers is wrongly taken as 45 instead of 15, the correct mean is :
30
15
20
18
(a) Find the mean of 7, 11, 6, 5 and 6.
(b) If each number given in (a) is diminished by 2; find the new value of mean.
If the mean of 6, 4, 7, a and 10 is 8, find the value of 'a'.