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Find the number of arrangements for placing 4 cars in 8 consecutive slots such that there is atleast one empty slot between any 2 cars?

Find the number of arrangements for placing 4 cars in 8 consecutive slots such that there is atleast one empty slot between any 2 cars?
A.120
B.180

there are 8 consecutive parking slots available in a hotel parking lot. in how many ways can 4 distinct cars be parked so that at least one parking slot remains vacant between any two cars?

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