A treasure box contained 3 bags of mint and 4 bags of chocolate. What is the probability of a student grabbing a bag of mint without looking?

3/7

Right.

To determine the probability of grabbing a bag of mint without looking, we need to know the total number of bags in the treasure box and the number of bags of mint in the treasure box.

In this case, we are given that the treasure box contains 3 bags of mint and 4 bags of chocolate, making a total of 7 bags.

The probability is calculated by dividing the number of favorable outcomes (grabbing a bag of mint) by the total number of possible outcomes (the total number of bags).

Therefore, the probability of grabbing a bag of mint is 3 out of 7, which can be simplified to the fraction 3/7.

So, the probability is 3/7.