To find the average we need to find the sum of the marks and divide it by the number of subjects. Here we have four subjects, Maths, Science, Social Studies, and English. Find Average Marks Summing up all the scores we have 70 + 60 + 80 + 50 = 260. The average mark is equal to the sum of the scores divided by the number of subjects. Using the SUBSTITUTE function is the quickest way to remove unwanted characters from a string. How To Remove Special Unwanted Characters in Excel from string with Excel And if you want to remove two or more characters ...This is an experimental formula to strip characters from text using a formula created with the Remove Special Characters from Text String with Excel LAMBDA Function LET and LAMBDA functions. Compare Two Columns to find differences in Excel using UNIQUE and VSTACK Functions See how to compare 2 columns in Excel and how to compare and match two lists with a different number of columns.