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Maths Puzzle
Amit has a RS 1,5 10 and 20 note in his wallet.how much ways are there for him to pull out 2 notes and have enough to pay Rs 8 for lunch?
Read Solution (Total 1)
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- total number of note = 4
total possible way of selecting 2 note = 4C2 * 2!= 4!/(2!*2!)*2=6*2=12
(1,5) and (5,1) don't give total greater than or equal to 8.
So , number of ways are= 12-2=10
i.e (1,10)(1,20)(5,10)(5,20)(10,1)(10,5)(10,20)(20,1)(20,5)(20,10) - 11 years agoHelpfull: Yes(3) No(1)
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