Aptitude - Average - Discussion

Discussion Forum : Average - General Questions (Q.No. 3)
3.
A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?
Rs. 4991
Rs. 5991
Rs. 6001
Rs. 6991
Answer: Option
Explanation:

Total sale for 5 months = Rs. (6435 + 6927 + 6855 + 7230 + 6562) = Rs. 34009.

Required sale = Rs. [ (6500 x 6) - 34009 ]

   = Rs. (39000 - 34009)

   = Rs. 4991.

Video Explanation: https://youtu.be/tP4hszReksU

Discussion:
59 comments Page 1 of 6.

Sairam.SG said:   2 years ago
Hi friends...

Here is the shortcut method to find this problem.

Given average sale for 6 months is 6500.

But we don't know 6 months reading.

Let it be x.

Now, According to the formula.

(6435+6927+6855+7230+6562+x)/6 = 6500
34009 + x = 39000.
x = 4991.
(42)

Balasubramaniyan said:   3 years ago
Difference between 6500 from each is 65,-427,-355,-730,-62.
Add the following:

= 65 - 427 - 355 - 730 - 62,
= -1509,
Subtract from 6500.
6500 - 1509 = 4991.
(11)

Karim khan said:   10 months ago
Add all 5 consecutive nos (6435 + 6927 + 6855 + 7230 + 6562) = 34009.
Sales for six months = (6500 * 6) = 39000.
At six months Rs = (39000-34009) = Rs. 4991.
(9)

Jaydeep said:   3 years ago
Assume that, 6th month is x.

6500 = (6435+6927+6855+7230+6562+x)/6.
So, x = 4991.
(7)

Chophel said:   2 years ago
Add all the values for 5 consecutive months which is equal to Rs. 34009.
Required sale is for six months is(6 * 6500) = 39000.
39000 - 34009 = 4991.
Therefore it's Rs. 4991.
(6)

Teja sai raj said:   3 years ago
Why should we multiply with 6?

They gave only 5 months.

Please help me to solve this.
(3)

Shivakumara Y said:   3 years ago
An easy way for this type of problem is;
Here, we have to find 6th month RS?
To find,
Solution:
(Add all 5 month Rs. + 6 th month RS.)/6= 6500,
i.e (34009+ 6th month Rs.)|6 =6500,
34009 + 6th month Rs. = 6500 * 6,
6th month Rs. = 39000 - 34009,
Ans 6th month RS. = 4991.
(2)

Dandabata said:   7 years ago
6435+65=6500
6927-427=6500
6855-355=6500
7230-730=6500
6562-62=6500

How this happen?

RAJKUMAR said:   8 years ago
(Add all) - (6*6500). Got answer.

Sana said:   7 years ago
@Swathy.

x = 5(7+5 = 1+2 = 3).explain this step.


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