Subject :IMO Class : Class 7
The average of 5 numbers is 6x. If four of them are x, 7, 6, 4, then find the fifth number. Give your answer in terms of x.
A 
B29x - 17
C6x - 17
D5x - 17
Ans 1:
Class : Class 3
Ans 2:
Class : Class 7
the solution has an extra 1 in the last 3rd line
Ans 3:
Class : Class 7