Question

the average income of x for 12 days is Rs4560.The average for first six days is Rs3340 and that of last five days is Rs.2260.calculate the income for seventh day?​
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Answer 1

Step-by-step explanation:

⇒  The average income of A for 15 days is Rs.70.

∴  Total income of 15 days =15×Rs.70=Rs.1050

⇒  The average income of first five days is Rs.60

∴  Total income of first 5 days =5×Rs.60=Rs.300

⇒  The average income of last nine days is Rs.80

∴  Total income of last 9 days =9×Rs.80=Rs.720

⇒  A′s income for 6th day = Total income of 15 days − Total income of first 5 days − Total income of last 9 days.

                                               =Rs.1050−Rs.300−Rs.720

                                               =Rs.30

∴  A′s income for 6th day is Rs.30.