- -_street -_with_7_houses,_2 - - -_houses_are_blue._If_a - - - ~ On a house from this street is selected at random, what is the probability of selecting a house that is blue?
Correct answer: B (parsed from the explanation — this source omits an answer key for this item)
Explanation
Choice B is correct. If a house from the street is selected at random, the probability of selecting a house that is blue is equal to the number of houses on the street that are blue divided by the total number of houses on the street. Since there are 2 blue houses on a street with 7 total houses, the probability of 2 selecting a house that is blue from this street is 7. Choice A is incorrect. This is the probability of selecting a house that is blue from a street on which 1 of the 7 houses is blue. Choice C is incorrect. This is the probability of selecting a house that is not blue from this street. Choice D is incorrect. This is the probability of selecting a house that is blue from a street on which all the houses are blue. 44 SAT PRACTICE TEST #6 ANSWER EXPLANATIONS SAT ANSWER EXPLANATIONS n MATH: MODULE 2
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