Average disbursement of loans over the years = Total disbursement of loans of all bank (In 2005 + In 2006 + In 2007 + In 2008 ) / Total number of banks
Total number of banks = Bank A + Bank B + Bank C + Bank D
Total number of banks = 1+1+1+1 = 4
Average disbursement of loans over the years = (87 + 104 + 113 +120)/4 = 424/4 = 106 ≈ 104
Which is nearly equal to the disbursement of loans in year 2006.
