A student wants to check six websites. Four of the websites are social and two are school-related. After checking just two sites, she has to leave for school.What is the approximate probability that she checked a social website first, then a school-related website?

The probability of checking a social website first is 4/6. After that, 5 websites remain, and 2 are school-related, so the probability of checking one second is 2/5. Multiply: (4/6)(2/5) = 8/30 ≈ 0.267, which is choice B, 0.267.

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