2 039
Wor
A grocer bought 1,500 kg of onions.
He left 50 kg for his personal use and sold the rest in bags of2
25 kg each.
How many bags of onions did he sell ?

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?