Wipro
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Numerical Ability
Age Problem
The average of 11 numbers is 50. If the average of first 6 numbers is 49 and that of last 6 is 52.Find the 6th number.
Read Solution (Total 6)
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- 11*50=550
6*49=294
6*52=312
550-(294+312)=56 =ans - 6 years agoHelpfull: Yes(2) No(0)
- shorter process
50*11 - (6*52-6*49) = 56 (ans) - 7 years agoHelpfull: Yes(1) No(3)
- The question is wrong first 5 number instead of first 6 number........
- 9 years agoHelpfull: Yes(0) No(4)
- you are wrong ANURADHA .....huh :/
- 8 years agoHelpfull: Yes(0) No(0)
- X1+X2+X3+X4+X5+X6=49*6=294.................(i)
X6+X7+X8+X9+X10+X11=52*6=312............(ii)
add (i) & (ii)
X1+X2+X3+X4+X5+X6+X6+X7+X8+X9+X10+X11=294+312
X6=606-550=56(ans) - 6 years agoHelpfull: Yes(0) No(0)
- Assume they are divide into 5=1=5
Take any 1 overlap
=1=5 (1+5=last 6)produces an effect of +2
This should be negated by the remaining numbers ie 5= by a -2 effect for the avg to be 50
but 5=1 produces -1 effect meaning =1= has a +1 effect on the first 5 when taken with them
Thus we take 6*+1 =6 and add to the Avg 50
You can do this with any grouping 1st 5 and 6
Or First 6 and 5 - 4 years agoHelpfull: Yes(0) No(0)
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