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sporty.arjun · 07-19-2008, 09:57 PM

Q.how many 5 digit nos. can be formed using the digits 0 2 3 4 5 when repetition is allowed such that the number is divisible by 2 or 5 or both?
OA:1500
Q. 4 persons enter a lift of a 7 storey building at the grnd flr. in how many ways can they get out of the lift other than the ground floor?
OA:1296
Q.10 diff alphabets r given. 2 of these letters followed by 2 digits are used to number the products of a company. in how many ways can the products be numbered?
OA:1000
Q.P(2n+1,n-1):P(2n-1,n)=3:5, find n...{what is this representation}?
cud sum1 tell me how 2 solve these?

07-19-2008, 09:57 PM	#1 (permalink)
sporty.arjun Eager! Join Date: Dec 2006 Posts: 88	Few Questions Q.how many 5 digit nos. can be formed using the digits 0 2 3 4 5 when repetition is allowed such that the number is divisible by 2 or 5 or both? OA:1500 Q. 4 persons enter a lift of a 7 storey building at the grnd flr. in how many ways can they get out of the lift other than the ground floor? OA:1296 Q.10 diff alphabets r given. 2 of these letters followed by 2 digits are used to number the products of a company. in how many ways can the products be numbered? OA:1000 Q.P(2n+1,n-1):P(2n-1,n)=3:5, find n...{what is this representation}? cud sum1 tell me how 2 solve these?