Final answer:
Pablo bought 35 caps.
Step-by-step explanation:
To find the number of caps that Pablo bought, we need to calculate the amount of money he spent on caps.
Now, let's calculate the number of caps Pablo bought. If 3 jackets cost the same as 15 caps, then 1 jacket costs the same as 5 caps.
Since Pablo used 3/7 of the remainder money to buy jackets, this means that he used 3/7 of the remainder money to buy 5 caps.
To find the number of caps, we can set up the following proportion:
(3/7) / (5/x) = 1.
Solving this proportion, we get x = 35.
Therefore, Pablo bought 35 caps.