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:
60 comments Page 2 of 6.

Venkat said:   1 decade ago
@avinash
i.e,
since 6500 is d average
we write down all as follows
6435+65=6500
6927-427=6500
6855-355=6500
7230-730=6500
6562-62=6500
add all the values (i.e 65,-427,-355,-730,-62) we get -1509 adding it with 6500 we get 4991

Chitti said:   5 years ago
5 consecutive months sale is 6435+6927+6855+7230+6562=34009.
So Avg of 5 numbers is,
34009%5 = 6,801.8.

Then to get avg sale 6500 in the 6th month.

From the options.
a) 4991--->34009+4991 = 39000.
(39000%6 )= 6500.
(1)

PIA said:   1 decade ago
HI FOLKS...ITS EASILY CN BE DONE AS:
LET THE SALE OF 6TH MONTH BE X
=>(6435 + 6927 + 6855 + 7230 + 6562 + X)/6=6500
=>(34009+X)/6=6500
=>34009+X=(6500 x 6)
=>X=39000 - 34009
=>X=4991
IE, RS.4991

Chophel said:   3 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.
(8)

Mrunali Ramteke said:   6 years ago
Let the sale of six month is x rs.

Total sale of 5 months is 6435+6927+6855+7230+6562=34009÷5.
But for the sixth month 34009+x÷6=6500 after solving the equation,
= 4991.

Priya said:   7 years ago
Consider the sale of 6th month=x.

6435+6927+6855+7230+6562+x/6 = 6500
34009+x/6 =6500

34009+x = 39000.
x = 39000-34009.
x = 4891.

Karim khan said:   2 years 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.
(17)

Gautam Sharma said:   1 decade ago
At First, Multiply 6500x6=39000 (bcoz avg is asking in Q)

Then, add all the 5 sale i.e 34009,

Deduct 39000 from the total sale i.e.34009, it becomes 4991.

Balasubramaniyan said:   4 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.
(18)

B.Geeth Yeswanth said:   7 years ago
Average=Sum of all observations/no.of observations.

6500=6435+6927+6855+7230+6562+x/6,
6500=34009+x/6,
X=6500*6 -34009,
X=39000-34009,
X=4991.


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