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Sol_Exam_STD_T110

# Sol_Exam_STD_T110 - TERM 1 STANDARD EXAMINATION 2010...

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TERM 1 STANDARD EXAMINATION 2010 CONCEPTUAL FOUNDATIONS — MATH21001 INSTRUCTIONS SHEET 1. Answer all questions in the Examination Answer Booklet provided. 2. Working and formulae must be shown to gain full marks in any question that requires calculation. 3. Write your name in the Question Paper and Rough Working Paper, and return those with the Examination Answer Booklet. Page 1 of 9

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TERM 1 STANDARD EXAMINATION 2010 CONCEPTUAL FOUNDATIONS — MATH21001 Probability Distribution Income in dollars ( X ) P ( X ) 500 0.4 1,000 0.3 2,000 0.2 3,000 0.1 Answer: Expected value of income = 500(.4) + 1000(.3) + 2000(.2) + 3000(.1) = \$1200 (3 marks) (b) A certain type of tomato seed germinates 90% of the time. A backyard farmer planted 24 seeds. What is the probability that exactly 20 germinate?

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