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Massachusetts Tests for Educator Licensure (MTEL ) www.mtel.nesinc.com

Mathematics (09) Practice Test - MTELs

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Mathematics (09) Practice Test80. Use the diagram below to answer the question thatfollows.board does not approveprob. = 0.45it does not rainprob. = 0.yyit rainsprob. = 0.zz0.270.18board approvesprob. = 0.xxit does not rainprob. = 0.yy0.vvit rainsprob. = 0.zz0.uuA teacher calculates the probability of success <strong>for</strong> an outdoorfield trip. For the trip to be a success, first, the school boardmust approve the plan, and second, it must not rain.According to the tree diagram above, what is the probabilityof a successful field trip?A. 0.18B. 0.22C. 0.27D. 0.3351

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