Question 1

Marie can assemble 15 circuits in 120 minutes.

Given that Marie can assemble two electronic circuits in 16 minutes, we can calculate her assembly rate and determine how many circuits she can assemble in 120 minutes.

A) 6 Circuits

Option A is incorrect because if Marie assembles 2 circuits in 16 minutes, then in 120 minutes, she would be able to assemble significantly more than 6 circuits. Specifically, 6 circuits would require only 48 minutes at her current rate.

B) 15 Circuits

Option B is correct. To find the total number of circuits Marie can assemble in 120 minutes, we first determine her rate: she assembles 2 circuits in 16 minutes, which translates to 7.5 circuits in 60 minutes (or 1 hour). Hence, in 120 minutes, which is double that time, she can assemble 15 circuits (7.5 circuits x 2).

C) 18 Circuits

Option C is incorrect because it overestimates the number of circuits Marie can assemble. Based on the calculated rate, assembling 18 circuits would require more than 120 minutes, as it would take approximately 96 minutes to assemble 18 circuits (based on her rate of 2 circuits every 16 minutes).

D) 40 Circuits

Option D is incorrect as it greatly exceeds the number of circuits Marie can assemble in 120 minutes. At her current pace, she cannot reach 40 circuits in that time frame, as this would require 320 minutes, which is not feasible within the 120-minute limit.

Conclusion

In summary, Marie can assemble 15 circuits in 120 minutes, as calculated from her rate of assembly. Options A, C, and D fail to accurately reflect her capabilities based on the provided information. Thus, B is the only option that correctly represents the number of circuits she can assemble in the given time.