In a scientific experiment, a model has 3 components: temperature, humidity, and air pressure. Five different temperatures, two different humidity levels, and four different air pressure levels are considered. For each model, a researcher chooses one value from each component. How many models are needed if the three lowest temperatures, the lowest humidity level, and two out of the four air pressure levels are selected?

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step-by-step explanation:

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answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %