Answer:
The answer is D. 55%
40% cashews in 15 ounces = 40/100 × 15 = 600/100 = 6 ounces of cashew
60% cashew in 45 ounces = 60/100 × 45 = 2700/100 = 27 ounce of cashew
total weight of the mixed nuts = 15 + 45 = 60 ounces
total weight of cashew = 27 + 6 = 33 ounces
% of cashew in the 60 ounce bag = 33/60 × 100 = 3300/60 = 55%