134 reputation
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age 23
visits member for 2 years
seen Jan 21 at 21:45

Boston Web Application Developer with an appetite for creative thoughts


Jan
31
revised Probability of getting 5 multiple-choice questions answered correctly
added 108 characters in body
Jan
31
comment Probability of getting 5 multiple-choice questions answered correctly
no total number of questions were of concern in the question. Maybe a total of 5? I got the same answer as above, so I guess I'll stick with that in the future when it is the case.
Jan
31
comment Probability of getting 5 multiple-choice questions answered correctly
i have no idea why that was the answer in the book, investigation time -.-
Jan
31
comment Probability of getting 5 multiple-choice questions answered correctly
haha it's 9pm here and i'm going through a book of hundreds of questions!
Jan
31
asked Probability of getting 5 multiple-choice questions answered correctly
Jan
31
comment In how many ways can 2 motors and 2 switches be selected?
That makes more sense.
Jan
31
comment In how many ways can 2 motors and 2 switches be selected?
Isn't the answer this? -> (8!/6!)(5!/3!), which is 1120
Jan
31
awarded  Scholar
Jan
31
accepted In how many ways can 2 motors and 2 switches be selected?
Jan
31
comment In how many ways can 2 motors and 2 switches be selected?
Almost had it! Thank you
Jan
31
awarded  Student
Jan
31
asked In how many ways can 2 motors and 2 switches be selected?
Dec
9
comment How many positive integers between 50 and 100 are divisible by 7?
Thank you for the clarification
Dec
9
awarded  Supporter
Dec
9
comment How many positive integers between 50 and 100 are divisible by 7?
If I understand this correctly, you are using the min range and max range and given the integer value, use what product to equal those ranges, then subtracting those products to get the number between the min and max range?