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20 December, 16:40

When Lucas goes to school, he passes two traffic lights. The probability of showing red is 70% and 80%. How likely is it that at least one of them shows green on the way to school?

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  1. 20 December, 19:49
    0
    0.44

    Step-by-step explanation:

    the probability the first one she's green (0.3) plus the probability the second shows green (0.2) minus the probability both occur (0.06) equals 0.44.
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