Mathematics
If the mean of four observations is 20 and when a constant c is added to each observation the mean becomes 22. The value of c is :
−2
2
4
6
Related Questions
The mean of five consecutive odd numbers A, B, C, D and E in ascending order is 37. What is the product of B and D?
1365
1585
1935
2035
The mean of 5 consecutive odd numbers of set A is 37. What will be the average of set B containing four consecutive even numbers if the smallest number of set B is 13 more than the greatest number of set A?
53
55
57
59