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?
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 6 of 6.
P .P.Anasuya said:
1 decade ago
(6435+6927+6855+7230+6562+y)/6=6500
34009+y=6500*6
Y=39000-34009
Y=4991
34009+y=6500*6
Y=39000-34009
Y=4991
Pradeep kumar said:
1 decade ago
Simple way.
(6500*6) = 34009+x.
Then
X = Rs.4991.
Where x= sale in rupees for the sixth month.
(6500*6) = 34009+x.
Then
X = Rs.4991.
Where x= sale in rupees for the sixth month.
Vicky said:
1 decade ago
(6535+6927+6855+7230+x)/6 = 6500.
34009+x = 6500*6.
34009+x = 39000.
x = 39000-34009.
x = 4991.
i.e., RS.4991/-.
34009+x = 6500*6.
34009+x = 39000.
x = 39000-34009.
x = 4991.
i.e., RS.4991/-.
Franklin said:
1 decade ago
Hi friends please use this shortcut (6435+6927+6855+7230+6562+x)/6 = 6500.
34009+x = 32500.
x = 4991.
34009+x = 32500.
x = 4991.
Gana said:
1 decade ago
Hi I got the new way but I don't this right or wrong but answer will be coming.
Total 5 month of purchase : (6435+6927+6855+7230+6562) Total = 34009.
You want 6th month sales so divide in total amount 34009 / 6 = 5668.16.
And less six month average amount 6500 - 5668.16 = 831.94.
Coming total multiple in 6 month 831.94 *6 = 4991.64 /-
Total 5 month of purchase : (6435+6927+6855+7230+6562) Total = 34009.
You want 6th month sales so divide in total amount 34009 / 6 = 5668.16.
And less six month average amount 6500 - 5668.16 = 831.94.
Coming total multiple in 6 month 831.94 *6 = 4991.64 /-
Swathy said:
1 decade ago
*****digital root concept****
Sale=6+4+3+5=9.
6+9+2+7=6.
6+8+5+5=6.
7+2+3+0=3.
6+5+6+2=1.
s/n = avg;.
avg = 6+5+0+0 = 2.
(9+6+6+3+1+x)/6 = 2.
9+6+6+3+1+x = 2*6.
7+x = 3.
x = 5(7+5 = 1+2 = 3).
4+9+9+1 = 2+3 = 5.
Answer: 4991.
Sale=6+4+3+5=9.
6+9+2+7=6.
6+8+5+5=6.
7+2+3+0=3.
6+5+6+2=1.
s/n = avg;.
avg = 6+5+0+0 = 2.
(9+6+6+3+1+x)/6 = 2.
9+6+6+3+1+x = 2*6.
7+x = 3.
x = 5(7+5 = 1+2 = 3).
4+9+9+1 = 2+3 = 5.
Answer: 4991.
Vignesh Prabhu said:
1 decade ago
Why are we multiplying 6500 with 6 ?
Swetha. said:
1 decade ago
This problem can also be done easily in this way:
Average = sum of observations/no.of observations.
Let the sale in 6th month be x.
We have avg = 6500., no.of months = 6.
Then, according to the above formula,
6500 = 6435+6927+6855+7230+6562+x/6.
=>6500*6 = 34009+x.
=>x = 39000-34009.
=>x = 4991. Hence, we got the sale in 6th month as RS. 4991.
Average = sum of observations/no.of observations.
Let the sale in 6th month be x.
We have avg = 6500., no.of months = 6.
Then, according to the above formula,
6500 = 6435+6927+6855+7230+6562+x/6.
=>6500*6 = 34009+x.
=>x = 39000-34009.
=>x = 4991. Hence, we got the sale in 6th month as RS. 4991.
Ankit yadav said:
10 years ago
Please Rs.6 when come.
Anonymous said:
10 years ago
Friends don't follow any tricks.
You can solve aptitude only if you have know concept so try to know concepts and practice more and more examples.
Then everything will be simple. More the examples you practice faster will be calculation after some time.
You can solve aptitude only if you have know concept so try to know concepts and practice more and more examples.
Then everything will be simple. More the examples you practice faster will be calculation after some time.
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