Question
A and B together can do a piece of work in 20 days. B
and C together can do the same of work in 25 days. C and A together can do the same work in 15 days. In how many days A alone can do the same work?Solution
Work done by A & B together = 20 Work done by B & C together = 25 Work done by C & A together = 15 Total work done A, B & C = LCM of 20, 25 & 15 = 300 units Efficiency of A & B together = 300/20 = 15 Efficiency of  B & C together = 300/25 = 12 Efficiency of  C & A together = 300/15 = 20 ⇒ 2(A + B + C) = 47 (Efficiency) ⇒ A + B + C = 23.5   ---- (1) ⇒ B + C = 12   ---- (2) From (1) and (2) ⇒ A = 11.5 ⇒ A alone can do the same work = total work/efficiency of A ⇒ A alone can do the same work = 300/11.5 = 600/23 days ∴ A alone can do the same work in 600/23 days
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Some medals are sports.
All the sports are games.
Conclusions:
I. Some medals are games.
II. No sport is medal
Statement:
Only Metal is Bronze
Some Metal are not Gold
All Gold are Diamond
 Conclusion:         Â
...
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All M are K.
All K are J.
All L are J.
No L is a P.
Conclusions: Â Â Â Â Â Â Â Â
I. No K is L...
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Statement:
Only a few mothers are father.
All fathers are daughter.
No daughter is son.
Conclusion:
I. Some mother can never be son.
II. No father is son.
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Only a few Boat are Ship
Some Ship are River
All River are Fish
Conclusion :
I. Some Boat are Fish
Statements:
Only a few Auctions is Sales.
Only a few Costs is Auctions.
No Cost is Inventory.
Conclusions:
Statements: Â
All gold are silvers.
All silvers are diamonds.
Some diamonds are ruby
No ruby is silver.
Conclusion...
Statements:All hotels are buses.
Some buses are cars.
All cars are trams.
Some trams are clouds.
Conclusions:I. Some trams a...
In the question below are given four statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true ...
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