Can you assemble this puzzle? #shorts

Person A can assemble 10 machines per hour and Person B can assemble 15 machines per hour. Person A works for x hours per day and Person B works for y hours per day and both the persons together can assemble at the most 200 machines in a day. Frame one inequation to represent the above data

3 students {A, B, C} tackle a puzzle together and offers a solution upon which majority of the 3agrees. Probability of A solving the puzzle correctly is p. Probability of B solving the puzzle correctlyis also p. Cisa dumb student who randomly supports the solution of either A or B. There is one morestudent D, whose probability of solving the puzzle correctly is once again, p. Out of the 3 memberteam {A, B, C} and one member team {D}, which one is more likely to solve the puzzle correctly.

Marconi assembled the radio.

Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.