A publisher wishes to publish some dictionaries to translate from one language in to the other. if he keeps his publication limited only up to languages, how many dictionaries will he have to publish then? if he wishes to increase 5 languages more, how many dictionaries more will he have to publish?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?