A bowl contains 10 red marbles and 10 green marbles. A woman selects marbles at random without looking at them. Assume that the woman does not replace the marbles after drawing them. How many marbles must she select to be sure of having at least three marbles of the same color

5 marbles

Step-by-step explanation:

Assume the first is color 1

and then the second is color 1

Now the third is color 2

The fourth is color 2

Now the 5th marble of either color will make 3 of one color

13

step-by-step explanation:

divide the cost of the total of sodas you bought by the cost of one soda, for example:

$24.57 divided by $1.89 is 13 which means you bought 13 sodas