Answer: 85
Explanation:
1. Divide the number of orange sweets by 3.
2. Multiply the quotient by 2.
3. Add the yellow sweets (the answer you get for the 2nd step), by the amount of orange sweets to get your answer.
=> 51 / 3 = 17
=> 17 x 2 = 34
=> 51 + 34 = 85