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Can you please site the source of this question? Here is my take: RAS = Room A – Seniors = 1/6 RAR = Room A - rest of the class = 5/6 RBS = Room B – Seniors = 5/7 RBR = Rest of the class in room B = 2/7 RCS = Room C – Seniors = 1/2 RCR = Room C - ½ 1. (RAS)(RBS)(RCR) = (1/6)(5/7)(1/2) = 5/84 2. (RAS...
- by ray
Sun Dec 23, 2007 4:21 pm- Forum: Problem Solving
- Topic: Probability Exercise
- Replies: 3
- Views: 3465
DS - Coats Q
It can't be "D". Here's why: First let deduce an equation from the word problem: X = selling price Y = purchase price Z = Profit Therefore: 20X – 20Y = Z --- Let's call it Equation 1 Are goal here is to find Z. Now let's look at statements 1 and 2 individually. 1. 20(2X) – 20Y = 2400 40X –...
- by ray
Sun Dec 23, 2007 12:36 pm- Forum: Problem Solving
- Topic: DS - Coats Q.
- Replies: 3
- Views: 2255