More students prefer Model 55 calculators than Model 66 calculators. More students prefer black Model 77 calculators than silver Model 66 calculators. More students prefer silver calculators than black calculators. The fewest students prefer black Model 55 calculators.

Based on the information provided, we can make the following conclusions:<br /><br />1. More students prefer Model 55 calculators than Model 66 calculators.<br />2. More students prefer black Model 77 calculators than silver Model 66 calculators.<br />3. More students prefer silver calculators than black calculators.<br />4. The fewest students prefer black Model 55 calculators.<br /><br />From the given statements, we can infer that the order of preference for the calculators is as follows:<br /><br />1. Black Model 77 calculators<br />2. Silver calculators<br />3. Model 66 calculators<br />4. Model 55 calculators<br /><br />Therefore, the correct answer is: More students prefer black Model 77 calculators than silver Model 66 calculators.