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The average age of five girls 11.The oldest among them is 15 years old.What is the average of the others?
Read Solution (Total 9)
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- Let "t" be the total age of 5 girls
Then t/5=11
t = 55
Oldest girl age is 15
Total age of other 4 girls is 55-15=40
Avg. of other 4 girls 40/4 = 10
Ans : 10 - 10 years agoHelpfull: Yes(48) No(0)
- avg age of 5 girls =11
(G1+G2+G3+G4+G5)/5 =11
G1+G2+G3+G4+G5 = 55
Oldest among them is =15y
i.e.,G5=15
G1+G2+G3+G4+15=55
G1+G2+G3+G4=40
avg age of others = ?
(G1+G2+G3+G4)/4 = 40/4 =10years
ans:10years
- 10 years agoHelpfull: Yes(3) No(0)
- 10
(55-15)/4=10
- 10 years agoHelpfull: Yes(2) No(0)
- 10
11*5=55
55-15=40
40/4=10 - 10 years agoHelpfull: Yes(2) No(0)
- total age of 5 girls is = 5*11=55
oldest girls age is 15
so total age of 4 girls is 55-15=40
average age of 4 girls = 40/4= 10
so the answer is 10 - 10 years agoHelpfull: Yes(1) No(0)
- 55-15/4
10
So ans is 10 - 9 years agoHelpfull: Yes(1) No(0)
- average age of 5 girls is 11 so 5*11=55
oldest person age is 15 so 55-15=40
remaining 4 girls age is 404=10 - 9 years agoHelpfull: Yes(1) No(0)
- (55-15)/4=10
- 9 years agoHelpfull: Yes(1) No(0)
- (x1+.......+x5)/5=11
(x1+..........+x5)=55
let older among 5 be x5,then (x1+....x4+15) =55
(x1+....+x4)=40 i.e sum of four girls is 40.then averageis
(x1+.....x4)/4=40/4=10 - 9 years agoHelpfull: Yes(0) No(0)
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