Mathematics
Find the arithmetic mean of :
(i) first eight natural numbers;
(ii) first five prime numbers;
(iii) first six positive even integers;
(iv) first five positive integral multiples of 3;
(v) all factors of 20.
Related Questions
Find the mean of each of the following sets of numbers :
(i) 10, 4, 6, 12, 9
(ii) 0.2, 0.02, 2, 2.02, 1.22, 1.02
The daily minimum temperature recorded (in degrees F) at a place during a week was as under :
Monday Tuesday Wednesday Thursday Friday Saturday Sunday 35.5 30.8 28.3 31.1 23.8 29.9 32.7 Find the mean temperature of the week.
The marks obtained by 10 students in a class-test were as follows :
38, 41, 36, 31, 45, 38, 27, 32, 29, 39
Find :
(i) the mean of their marks;
(ii) the mean of their marks, when the marks of each student are increased by 2;
(iii) the mean of their marks, when 1 mark is deducted from the marks of each student;
(iv) the mean of their marks, when the marks of each student are halved.
If the mean of 11, 8, 13, 10, x and 9 is 9.5, find the value of x.