Latest TCS Aptitude Question SOLUTION: if there are 11 no.s such that the average of first six no.s is 42 and the average of last 6 no.s is 54 then find the 6th no.

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(#M40155635) TCS Numerical Ability question march 2nd off campus Keep an EYE

if there are 11 no.s such that the average of first six no.s is 42 and the average of last 6 no.s is 54
then find the 6th no.

Asked In TCS tejaswi (8 years ago)

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tejaswi  (8 years ago)

sum of first 6 no.s = 42*6 =252
sum of lst 6 no.s = 54*6 = 324
as there are 11 no.s let they be a b c d e f g h i j k
here 6th no. is considered both in 1st 6 no.s and last 6 no.s
soo substractng both of them gives 324-252 =72

i dnt knw how to find after this

Is this solution Helpfull? Yes (3) | No (2)  

madhavi  (8 years ago)

I got answer 56.
Anyone got?
please reply

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srimanth  (8 years ago)

yes ans is 56

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ankit das  (8 years ago)

answer will be 26(if the data provided here and in the comments are correct)
hint : sum of 11 nos. = 11 x 50
sum of first 6 = 6 x 42
sum of last 6 = 6 x 54

so now, sum of 11 = sum of first 6 + sum of last 6 - 6th term

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shruthi  (8 years ago)

average of 11 number is 50

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Nidhi Singh  (8 years ago)

I got 26 as answer.

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Sunil Narendra Goudar  (8 years ago)

where is avg of 11 people that is given in paper

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tejaswi  (8 years ago)

im the one posting the above qstn and im pretty sure that total average of 11 no.s is nt given in the problem.

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purnima  (8 years ago)

guys anyone remember that" freelancer" question??

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Debapriya Mallick  (7 years ago)

HOW U GET THE AVG OF 11 NOS IS 50?????????????

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azad khan  (7 years ago)

first 6->42*6=252
last 6->54*6=324
(324-252)=72 answer

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minakshee awari  (7 years ago)

54-42=12
12*6=72

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yasam shruthi  (6 years ago)

avg =50 so total sum of 11 numbers=550
let 6th no is x,so acc to the given condition
sum of first 5 nos=6*42-x=252-x
sum of last 5 nos=54*6-x=324-x
so 6th term x=550-(252-x)-(324-x)
550-252+x-324+x
2x+550-576
2x-26
x=13

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Shrestha Das  (5 years ago)

Average of 11 numbers is 50 which is not given in the question.So the final answer will come as (6×42+6×54)-(11×50)=26

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