Posted by **jasmine20** on Tuesday, January 9, 2007 at 7:38pm.

can someone correct this for me please.

Statistics. Sam must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75,63, and 68. Write an inequality representing the score that Sam must get on the last test to get a C grade.

Total marks in 3 test 75+63+68 >= 206

Let score in the last test = x

Total score in 4 test = 206 + x

Average in 4 test = A >=(206 + x) / 4

A>= 70