Question

(1) Bag A contains 5 red marbles and 7 white marbles. Bag B contains 6 red marbles and 9 white marbles. (a) Two marbles are picked randomly from bag A. What is the probability of getting two red marbles ? (b) A marble is picked from bag A. If it is a red marble, it is put into bag B. Otherwise, the marble is put back into bag A. Then a second marble is picked from bag B. Find the probability that the two marbles are (i) Of red colour (ii) Of different colours

Answer 1

Answer:

Since 4/10 reduces to 2/5, the probability of drawing a red marble where all outcomes are equally likely is 2/5. Expressed as a decimal, 4/10 = . 4; as a percent, 4/10 = 40/100 = 40%. Suppose we number the marbles 1 to 10.

Step-by-step explanation:

The probability of drawing a black marble from a bag is 1/4, and the probability of drawing a white marble from the same bag is 1/2.