Question
Five squares of a chessboard are chosen at random, the
probability that three are of one colour and two of another isSolution
5 squares on a chessboard can be chosen in 64C5 ways Three squares of one colour and two squares of different colour can be chosen in two mutually exclusive ways (i) 3 white and 2 black (ii) 3 black and 2 white Thus, the favourable number of cases = 32C3 × 32C2 + 32C2 × 32C3 = 2 × 32C2 × 32C3 Required Probability = 2 × 32C2 × 32C3 / 64C5
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Only a few hemispheres is atmosphere.
None of the atmosphere is atom.
No atom is a base.
Conclusions:
I... Statements:
Some mats are bedsheets.
All bedsheets are chairs.
Some chairs are desks.
Conclusions:
I. Some desks...
Two statements are followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they do not conform to real-world...
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Only a few Lotion is Shampoo.
No Shampoo is Conditioner.
Only Conditioner is Soap.
Conclusion:
I. So...
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Only a few Harpic is Lizol.
Only a few Lizol is Detergent.
No Harpic is Pesticide.
Conclusion :
I. Ev...
. Statements:Â
No Dell is Asus.
No Acer is Bosch.
Only a few Bosch are HP.
All Acer are Asus.
Conclusions:
<...Statements:
Mostly table is chair.
Only chair is desk.
No table is board.
Conclusions:
I. No desk is board.
II. All chair can be board.
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Some banks are lockers.
Some lockers are stores.
Some stores are panels.
Conclusions:
I. No bank i...
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Some Mars are Planets.
Some Planets are not Stars.
Some Stars are Bright.
Conclusions:
I. Â Some Bri...
Statements:
Only a few Products are Price.
Only Prices are Place.
No Price is Promotion.
Conclusion
I) Some Pro...
