Question

An amount of rs 4000 is distributed into three investment at the rate of 7% ,8% and 9% per annum respectively. The total annual income is rs 317.50 and the annual income from the first investment is rs 5 more than income from the second .find the amount of each investment using matrix algebra.

Answer 1

Answer:

and 9% per annum respectively. The total annual income is Rs. 317.50 and the annual

income from the first investment is Rs. 5 more than the income from the second. Find

the amount of each investment using matrix algebra.

(b) A wholesaler of pencils charges Rs. 24 per dozen on orders of 50 dozens or less. For

orders in excess of 50 dozens, the price is reduced by 20 paise per dozen in excess of

50 dozens. Find the size of the order that maximizes his total revenue.

(c) A computer is purchased for Rs. 50,000. It is estimated to depreciate at 10% per

annum every year. Find its scrap value at the end of 12 years.

Step-by-step explanation: