Question

Eva invest a total of rupees 1000 in three accounts one paying 5% intrest another paying 5% intrest and the third paying 8% intrest the annual intrest earned on the three investments last year was rupees 570 the amount invested at 9% was twice the amount invested at 5∆% determine the coefficient matrix and find the rank of the phenomena​

Answer 1

Answer:

give the picture so I will solve in two minutes