When a bag of apples and a single apple are dropped at the same time from the same height, why do they both hit the ground at the same time even though one has a bigger mass?

The bigger Mass takes more Force to accelerate to the ground. The smaller Mass takes less Force to accelerate toward the ground. Coincidentally gravity exerts more force on the bigger mass and less force on the smaller Mass. The result is that all objects fall with the same acceleration. All objects reach the same speed after the same falling time. And all dropped objects hit the ground at the same time. We've known this for about 300 years.