Steve

Questions

Newest questions posted by Steve
  1. Math

    A biased coin lands heads with probabilty 2/3. The coin is tossed 3 times a) Given that there was at least one head in the three tosses, what is the probability that there were at least two heads? b) use your answer in a) to find the probability that there
  2. math

    prove that (n choose k) = (n-1 choose k-1) (n-1 choose k) a) By using formula of (n choose k) b) by breaking subsets of size k into two mutually exclusive classes, one class comprising all those subsets which contain a given element and the other all those
  3. Math

    prove (n choose k) = (n choose n-k)
  4. Math

    A biased coin lands heads with probabilty 2/3. The coin is tossed 3 times a) Given that there was at least one head in the three tosses, what is the probability that there were at least two heads? b) use your answer in a) to find the probability that there
  5. Math

    A biased coin lands heads with probabilty 2/3. The coin is tossed 3 times a) Given that there was at least one head in the three tosses, what is the probability that there were at least two heads? b) use your answer in a) to find the probability that there

Responses

Newest responses posted by Steve
  1. Math

    Hard? Not so. If y = 2x^2-4x then what is y when x=5? Just replace all the x's with 5's and you have y = 2*5^2 - 4*5 = 30
  2. Math

    30tons/day * 2000lb/ton * 1day/24hr * 1hr/60min = 125/3 lb/min see how the units cancel out.
  3. Math ~ Adding & Subtracting Decimals

    yes
  4. Algebra or math

    (x^2-5x)^2-36 = (x^2-5x)^2 - 6^2 recall that a^2-b^2 = (a+b)(a-b). so, now you have = (x^2-5x+6)(x^2-5x-6) = (x-3)(x-2)(x-6)(x+1)
  5. Algebra Please Help ASAP

    only if a-b=0 since (a-b)^2 = a^2-2ab+b^2 so, 2ab = a^2+b^2