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Numerical Ability
Probability
There are 14 spots. Each spot has 8 seats. 28 people seated in all spots. No similar number of people sat in any spot. How many spot left with no people at all.
a) 7
b) 10
c) 8
d) 12
Read Solution (Total 7)
-
- ans: 7
total 14 spots with 8 chairs
at each spot different number of people
so, possible combinations
1+2+3+4+5+6+7+8
but,
only 28 people their
so,
1+2+3+4+5+6+7=28
so 7 possibilities
vacant=14-7=7 - 11 years agoHelpfull: Yes(14) No(2)
- ther r 14 spots with 8 seats
no.of people n each spot should be diffeerent
=> no. of peple n 5 of 14 spots may be 1,5,6,7,8
=>5+6+7+8+1=28
so, th ans may 9 too.. - 11 years agoHelpfull: Yes(6) No(2)
- the ans is 8
- 11 years agoHelpfull: Yes(3) No(6)
- The total spots available is 14
Among 28 1 sat in the 1st spot
similarly up to 7th spot 28 occupy
ie.,1+2+3+4+5+6+7=28
Left out spot=14-7=7
the answer is 7. - 11 years agoHelpfull: Yes(3) No(0)
- in 1st spot one person sit, 2nd spot 2 person sit,like this goes on and in 7th spot seven person sit so 1+2+3+4+5+6+7=28,so left spots are 7. Hence answer is 7
- 11 years agoHelpfull: Yes(2) No(0)
- 28/8=3 and 4 as rem..
so..14-(3+1)=10 - 11 years agoHelpfull: Yes(1) No(3)
- I think this is a dummy qstn. bcoz, and may be 7, 8 or any thing
- 9 years agoHelpfull: Yes(0) No(1)
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