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Dmitry_Shevchenko [17]
2 years ago
7

On a Sunday night, there are four people on a bus. The bus has five stops left before it end sits route. Suppose each person wil

l get off the bus at one of the stops, and will do so randomly
1- How many different ways could the people get off the bus?
2- What is the probability that all four people get off the bus on the first stop?
3- What is the probability that all four people get off the bus on the same stop?
4- What is the probability that exactly three of the four people get off the bus on the same stop?
Mathematics
1 answer:
allochka39001 [22]2 years ago
3 0

There are two possible outcomes of this experiment either success p or failure q. It has a given number of trials and all trials are independent therefore it is<u><em> binomial probability distribution.</em></u>

1-  5 ways

2- 5/16

3- 1/16

4- 1/16

In the question given above n= 5 p =1/2 q= 1/2  r is the given point.

  1. <u>Part 1:</u>

The number of ways in which different people get off the bus can be calculated using combinations since the order is not essential. Therefore

nCr= 5C4= 5 ways

<u>2. Part 2:</u>

The probability that all four people get off the bus on the first stop is given by :

P (x= 1)= 5C1 (1/2)^0(1/2)^4= 5(1/2)^4= 5/16

<u>3. Part 3:-</u> The probability that all four people get off the bus on the same stop.

P (x= x)= 5C5 (1/2)^0(1/2)^4= 1(1/2)^4= 1/16

<u>4. Part 4-</u> The probability that <u><em>exactly three of the four</em></u> people get off the bus on the same stop.

P (x= x)= 5C5 (1/2)^3(1/2)^1= 1(1/2)^4= 1/16

For binomial distribution click

brainly.com/question/15246027

brainly.com/question/13542338

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<em>Answer:</em>

<em><u>X = 80</u></em>

<em>Step-by-step explanation:</em>

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<em>X = </em><em>80</em>


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