Question

A box contains 7 green marbles and 11 white marbles. If the first marble chosen was a green marble, what is the probability of choosing, without replacement, another green marble? Express your answer as a fraction or a decimal number rounded to four decimal places.

Answer 1

classmate Date Page 0 seli lef A denote the ои first of marble evend of getting event of getting to find the probasility of event A B denote the mable have Second draw we the and B de PLAB) P(A). P(BA) Where PCA) 18 to find Conditions we assume out there been and the In order Prob. P(B/A), that event A has already happened, ie green marble have taken remains 6 green white marbles offer drawing. The poob. of getting green marble (BA) = e now i Poob is Hence required PCAB) = 16 0.1372 Aus 306

Answer 2

7-1=6 green marbles that’s left Total 7+11=18 18-1= 17 that’s total left marbles 6/17=0.3529 is the correct answer