In a legislative assembly election, a political group hired a public relations firm to promote its candidate in three ways: telephone, house calls, and letters. The cost per contact (in paise) is given in matrix A as A=[40 100 50] teleph0ne housecalls letter The no. of contacts of each type made in two cities Xand Y is given by B=[1000 500 5000] [3000 1000 10000] Find the total amount spent by the group in the two cities X and Y

Explanation

Total amount`=sum_(types)`(cost per contact).(no.of contacts)

cost per contact`=A`

no.of contacts`=B`

Total amount`=B.A`

`=[[1000,500,5000],[3000,1000,10000]][[40],[100],[50]]`

`=[[40000+50000+250000],[120000+100000+500000]]`

`=[[340000],[720000]]`

`340000=X,720000=Y`

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