On an average, 220 customers visited a food junction for 30 days. The average number of customers for the first 12 days is 218 and that of the last 16 days is 225. Find the total number of customers on the 13th and 14th of the month and also find the average number of customers on these days.
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Step-by-step explanation:
If a month starts with Sunday, then the number of Sundays in that month is 5
The remaining days is 30−5=25
Given that average number of visitors on Sundays is 510
Therefore, 510=
5
sum of the number of visitors on Sundays
⟹sum of the number of visitors on Sundays=510×5=2550 -----(1)
Given that average number of visitors on other days is 240
Therefore, 240=
25
sum of the number of visitors on other days
⟹sum of the number of visitors on other days=240×25=6000 -----(2)
Total average is
30
total number of visitors
=
30
2550+6000
=
30
8550
=285
Therefore, the average number of visitors per day in a month of 30 days beginning with a Sunday is 285
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