Mathematics
Answer
(i) The multiplication AB is possible because the no. of columns in A is equal to the no. of rows in B.
(ii) The multiplication BA is possible because the no. of columns in B is equal to the no. of rows in A.
(iii) The multiplication A2 is NOT possible because the no. of columns in A is not equal to the no. of rows in A.
Related Questions
Case study:
Neeta, Salma and Vivian are neighbours in different flats of the same building. Last Sunday, they went together to a departmental store to buy groceries.The groceries purchased by them is as shown below.
Pulses(kg) Tea packets Refined oil(litre) 1.Neeta 15 3 8 2.Salma 10 4 12 3.Vivian 5 5 9 The prices of the items are as follows :
Pulses : ₹ 170 per kg
Tea : ₹ 150 per packet
Refined oil : ₹ 250 per litre
Using matrix multiplication, find the total amount that Neeta, Salma and Vivian paid.
