The total amount of clips in the box, is:

Since there are 3 blue clips, the probability of picking a blue clip, is:

Since there are 4 pink clips, the probability of picking a pink clip, is:

The probability of both events happening one after another will be the product of the individual probabilities of each event. Then, the probability of picking a blue clip and then picking a pink clip, is:

Therefore, the answer is:
