 Hello and welcome to the session. In this session, we discuss the following questions with face. If matrix with elements 1, 2 in the first row, 3, 4 in the second row into the matrix with elements 3, 1 in the first row, 2, 5 in the second row is equal to the matrix with elements 7, 11 in the first row, k, 23 in the second row, then write the value of k. Let's proceed with the solution now. We are given that the matrix with elements 1, 2 in the first row, 3, 4 in the second row, multiplied with the matrix with elements 3, 1 in the first row, 2, 5 in the second row is equal to the matrix with elements 7, 11 in the first row, k, 23 in the second row. Then we are supposed to find the value of this k. Now, let us multiply the two matrices on the left hand side. So, we get a matrix of order 2 by 2 only. Let's now find out the elements of this matrix. So, obtain and it would be given as 1 into 3 plus 2 into 2. Then second element of the first row would be given as 1 into 1 plus 2 into 5 and of the second row would be given as 3 into 3 plus is equal to the matrix with elements 7, 11 in the first row, k, 23 in the, this gives us a matrix with elements 3 plus 4 is 7. 1 plus 10 is 9 plus 8 is 17, 23 and this is equal to a matrix with elements 23. In both the matrices, we get the value of k as k is equal to 17. In this session, hope you understood the solution of this question.