Question

A bag contains 6 red tiles and 15 yellow tiles. Lilia removes 2!red tiles. How many yellow tiles should she remove so that the ratio of red tiles to yellow tiles in the bag stays equivalent to 6 : 15?

Answer 1

Answer:

5

Step-by-step explanation:

ratio 6 to 15 is 2 to 5

so if 2 red tiles are removed, 5 yellow tiles should be removed

Answer 2

Pr {red then red } = (1/2)*(1/2) = 1/4

Step-by-step explanation:

A total of 6 tiles are in the bag.

So Pr{red} = 3/6 = 1/2

Since there is replacement, the probability of the 2nd being red is again

Pr {red} = 3/6 = 1/2

Pr {red then red } = (1/2)*(1/2) = 1/4