Aptitude - Average - Discussion

(510 * 5 + 240 * 25)/30.
= 2550 + 6000.
= 8550/30.
= 285.

(510*5+240 * 25).
= 2550+6000,
= 8550/30,
= 285.

@Sam.

Average visitors per day = Total sum of all visitors in the given month/number of days in that month.

@Sam.

Average visitors per day = Total sum of all visitors in the given month/number of days in that month.

They asked for avg visitors per day in a month but we found the avg visitors for the whole month. I'm confused. Please anyone clear this.

Guys, please note the last line of question " a month of 30 days beginning with a Sunday". It is clear that the month begins with Sunday.

Further, In 4 weeks we have (7*4= 28 days). Here we have 4 Sundays.
Again, In remaining remain 2 days, we have one Sunday and one Monday.
Therefore, the total number of Sunday= 5 (4+1).
Remaining other days= 25.

The required avg. Visitors per day in a month = (510*5+ 240* 25)/ 30.
= (2550+6000)/ 30.
= 8550/30.
= 285 -> answer.
I hope that you guys got it.

@Naina.

In given question, 30 days are mentioned, but according to you not every month has five Sundays but if you noticed that month has started from Sunday when the month started from Sunday it has five Sunday in that month.

Hope you get cleared with that question.

@All. Not all months with 30 days have 5 Sundays.

What if there are 4 Sundays in a month of 30 days, then the answer will be 276.

The average on sundays exceeds the normal day average by= 510-240 = 270,

There are 5 such sundays, so totally we have to adjust = 270 * 5,
Now, this has to be adjusted into all day s of the month = 30 days,
So we have 270 *5 / 30 = 270 / 6 = 45,
If we add this to the original avg we get the answer = 240 + 45 = 285.

Hey, everyone! what if the month has 31 days? There is a possibility of that as well! right?

Can someone please explain?