Answer:
(12 × [ 4 ]) [ + ] (10 × [ 6 ])
Explanation:
There are 12 younger campers, and each of their boxes contains 4 prizes.
I.e 12 × 4 = 48 prizes
There are 10 older campers, and each of their boxes contains 6 prizes.
I.e 10 × 6 = 60 prizes
Many prizes Ursula needs in all
That will be 48 + 60 = 108 prizes.