Question on-a-s
On a street with houses, houses are blue. If a house from this street is selected at random, what is the probability of selecting a house that is blue?
On a street with 7 houses, 2 houses are blue. If a house from this street
Easy-difficulty · SAT Math · Probability & Conditional Probability — Simple probability. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer 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 blue houses on a street with total houses, the probability of selecting a house that is blue from this street is .
Choice A is incorrect. This is the probability of selecting a house that is blue from a street on which of the 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.
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