Question

Give a matrix a how many sub matrix can be formed

Answer 1

Step-by-step explanation:

3 Answers. To form aSub-matrix , we have a choice for each row & column - to take or not to take. So, total we have 2m * 2n choices , But we have to exclude matrix having 0 rows & 0 columns - which can be formed when we delete all rows OR All Columns , which correspond to 2m + 2n - 1