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Logical Reasoning
Nine persons went to the hostel for taking their meals, 8 of them spent Rs.12 each on their meals and ninth spend Rs. 8 more then the average expenditure of all nine. What is the total money spent by them?
Read Solution (Total 5)
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- let x be the avg expenditure
now (8*12)+(x+8)=9*x,x=13
total expenditure=9*13=117 - 10 years agoHelpfull: Yes(2) No(0)
- Let 'x' be the avg expenditure
now (8*12)+(x+8)=9*x => x=13
total= 13+8+(8*12)=117 - 10 years agoHelpfull: Yes(1) No(0)
- why to take ninth person as x..?
8 of them spent 12 rs each but 9th person spent 8rs more than others so we can take it as 12+8 right..? - 7 years agoHelpfull: Yes(1) No(0)
- average=sum of cost of 8 persons i.e.,(12*8) and cost of 9th person divided by 9
let average be A
given 9th person spends 8 rs more than average
so cost of 9th person meal = A+8
therefore,
A=((12*8)+(A+8))/9
9A=96+A+8
9A-A=104
8A=104
A=104/8=13
Average=13
total spent=13*9=117 - 6 years agoHelpfull: Yes(1) No(0)
- let the average of all the nine persons be x
72 is the spent of 8 persons
x+8 is spent by the ninth person
=> ((12*8)+(x+8))/9)=x
=> x = 10
total money spent by them = (12*8)+(10+8) = 72 + 18 = 90 - 10 years agoHelpfull: Yes(0) No(4)
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