Qualification > Math

S1 and S2 DOUBTS HERE!!!!

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immortal:
Da MS smetimes tends 2 b wrong.

Saladin:

--- Quote from: T.Q on May 17, 2010, 06:17:04 pm ---same as ur method

but at the end u have to subtract



--- End quote ---

oops, forgot that part. heheheh.

solo_G:
okay guys i have a doubt....
of the customers visiting the stereo section of a large electronic store 75% on average make a purchase....find the least possible number of customers, given that the probability of all customers making a purchase is less than 5%
thanks in advance  ;D

solo_G:
ehm ehm one more doubt ;D ;D
A license plate has 3 letters and 3 digits in that order.A witness to a hit and run accident saw the first 2 letters and the last digit.If the letters and digits can be repeated,how many license plate should be checked before finding the culprit?
ANS: 2600

Thanks again ;D

immortal:

--- Quote from: solo_G on May 21, 2010, 04:21:41 am ---ehm ehm one more doubt ;D ;D
A license plate has 3 letters and 3 digits in that order.A witness to a hit and run accident saw the first 2 letters and the last digit.If the letters and digits can be repeated,how many license plate should be checked before finding the culprit?
ANS: 2600

Thanks again ;D

--- End quote ---

###***
26C1=26(choosing da last remaining letter)
10C1*10C1=100(choosing both digits,dey cn b repeated)
26*100=2600

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