Answers (7)

Try solving 25 and 26 by yourself and we can tell you where u r wrong

For 27 sum i kept an image say where I did wrong in 2nd method

About the 27th will revert soon

About 27th, second method - we cannot use Tn=0 as we are not sure what is the last term, it could be 15,10,5,0 or something else

About 27th, second method - we cannot use Tn=0 as we are not sure what is the last term, it could be 15,10,5,0 or something else

When the total amount to be paid is 975 then tn becomes zero know sir

When the total amount to be paid is 975 then tn becomes zero know sir

When instalment is zero you will not make a payment. When 15th installment is 30 and we pay 30, then that is the last installment at that point the next installment value is zero and we will not payment for next installment. So 15th installment of Rs.30 is considered as last installment and hence we cannot use tn = 0