Question

^{1. From an urn, 10 balls with replacement are selected, the urn contains 14 white balls and 5 red balls.
Calculate the probability that less than 3 red balls have come out.}

^{2. From an urn, 10 balls are selected with replacement, the urn contains 14 white balls and 14 red balls.
Calculate the probability that at least 3 red balls have come out.}

^{3. From an urn 5 balls without replacement are selected, the urn contains 11 balls, of which 6 are red balls.
Calculate the probability that more than 3 red balls have come out.}

Answer 1

14 whit balls Tetadcou Red balls P(Less tham 3 Red balls, .. ie P(x 3) P(x o) + P(x = 1) t P (x = 2) 10 4 14 1g/ CI 0.486 14 white balls = 14 Red balls P(tleaut P( x2 3) 3 ed ball léptd -1-P(x 4 3) P(x o) +P (x =1 ) + P(X2) 7 I C LC 28 28 O-054 7 O. 9453 - to Total balls Red balls Red balls) PMove tham pela I-P(x3) P(X3) PX=o + P(x1) +P(X=2) tP(X=3)J 5C 5 CE t 1 2 Cs 11CE 0./753/