Kim had 120 cards in a box. she gave 6/10 of the cards to maddy. how many cards did kim have left in the box?

This is different from the first one can someone me

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?