An apartment has 8 floors An elevator starts with 4 passengers and stops at 8 floors of the apartmen...........

Quantitative Aptitude ( CCS) Probability

An apartment has 8 floors. An elevator starts with 4 passengers and stops at 8 floors of the apartment. What is the probability that all passengers travels to different floors?

109/256

135/256

105/256

95/256

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Explanation:

Answer & Explanation
Answer – 105/256
Explanation :
Total outcomes = 8*8*8*8
Favourable outcomes = 8*7*6*5 (first person having 8 choices, after that second person have 7 choices and so on)
So, probability = 105/256