exam Maths Puzzle Numerical Ability

Will someone please help me with this, this is my last problem, I just do not no HOW to come up with the percent of everything. For the first problem 'What % of the monthly budget

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exam Other Question

Please help me solve this problem. radical 3x/2y. The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job. The company has 4 experienced plumbers and 4 trainees. If a team consists of 1 experienced plumber and 2 trainees, how many different such teams are possible?