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Exam
Numerical Ability
Number System
Find the average of square of first 44 natural numbers is
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- Ave = (1^2+2^2+3^2+...+44^2)/44 = 44(44+1)(2*44+1)/(6*44) = 667.5
- 10 years agoHelpfull: Yes(3) No(0)
- from mathematical induction sum of squares of natural numbers is (n(n+1)(2n+1))/6
so (44*45*89)/6=29370
NOw avg means sum by number of terms so 29370/44=667.5 - 10 years agoHelpfull: Yes(2) No(0)
- we know (1^2+2^2+3^2+......n^2)=n(n+1)(2n+1)/6
s0 avg is 667.5 - 10 years agoHelpfull: Yes(1) No(0)
- 667.5 is the avg
- 10 years agoHelpfull: Yes(0) No(0)
- 1+4+9+16+25+36+49+64+81+100+121+....44^2=29370
the average of the above number=667.5 - 10 years agoHelpfull: Yes(0) No(1)
- 655.4772727
- 10 years agoHelpfull: Yes(0) No(0)
- 44*45*89/6*44=667.5
- 7 years agoHelpfull: Yes(0) No(0)
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