(Level 4) In a bag of orange, red, and yellow, 60% are orange, and 10% are red. There are 6 yellow marbles in the bag. If you increase the number of orange marbles by 50%,
how many orange marbles are in the bag?

Assemble the proof by dragging tiles to the statements and reasons column

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

What is the missing value in the proportion 4/5 = x/30