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Logical Reasoning
Number Series
Two consecutive numbers are removed from the progression 1, 2, 3, ...n. The arithmetic mean of the remaining numbers is 26 1/4. The value of n is
Read Solution (Total 3)
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- sum of n nos: n(n+1)/2
let n=50
(50*51)/2=1275
(50-1)*(105/4)=1260
i.e(1275-1260)=15i.e (7+8)
other options will give u decimal numbers but sum of two consecutive number cannot be decimal
so, answer is 50
- 8 years agoHelpfull: Yes(2) No(1)
- @PUJA DHAR in the fourth line instead of (50-1)*105/4 it should be 48* 105/4=1260 as two numbers are removed from the list.
- 8 years agoHelpfull: Yes(2) No(1)
- so right ans..is n=50
- 8 years agoHelpfull: Yes(0) No(1)
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