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alyaa4life
in how many ways can a person answer 5 true or false questions?
each question can be answered in 2 ways ie 2C1. there are 5 questions. so the no of ways is 2*2*2*2*2=32 ways
thhanks!!! but how about in how many ways the exam be completed if a penalty is imposed for each incorrect answer, so that a person may leave some questions unanswered?
so now there are three different ways to answer; true , false or blank
when there were only two ways to answer there were \(2^5\) ways now there are three ways the are \(3^5\) ways
awesome! thank you very much!!!! :)
a customer using an automatic teller machine (atm) must enter a 4- digit pin number in order to gain access to his account. if repitition of the same four digits is not allowed.(eg 3333) how many possible combinations are there?
do you know to to find how many combinations possible , if repetition was allowed?
im not sure, im sucks at this :(
how many 4 digits number can be formed with 1, 2,3,6,7,8 if each digit is used most at once? how many of these smaller than 600? ans( 360, 60)
how many combinations can a digit be?