One teacher from Argentina, one from Brazil and three from Namibia attend an international conference. One of these five teachers is choosen at random to make a speech, and one of the remaining four is choosen at random to write a report.
(a) Calculate the probability that neither the chosen teachers was from Namibia.
(b) One of the remaining three teachers is chosen at random to chair the conference. Calculate the probability that this teacher is from Brazil.
2007-03-29 00:13:12 · 3 answers · asked by Joh 1 in Science & Mathematics ➔ Mathematics
(a) Probability that neither was from Nambia is
the probability that the Brazilian OR the Argentinian is chosen first X the probability that the non-Nambian is chosen next time ...
P = 2/5 X 1/4
(b) Probability that the Brazilian teacher is finally chosen as chairperson is
The probability that the Brazilian isn't chosen first, multplied by the probability that the Brazilian isn't chosen next time round, multiplied by the probability that the Brazilian IS chosen the third time round ...
P = 4/5 X 3/4 X 1/3
2007-03-29 01:03:04 · answer #1 · answered by Orinoco 7 · 0⤊ 0⤋
a) probability is 2/5
b) 1/4
2007-03-29 08:03:06 · answer #2 · answered by Anonymous · 0⤊ 0⤋
this is how u do ur homework stop cheating
2007-03-29 07:23:08 · answer #3 · answered by singervv01 1 · 0⤊ 0⤋