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iris [78.8K]
2 years ago
13

A special promotion for its 20-ounce bottle of soda, a soft drink company printed a

Advanced Placement (AP)
1 answer:
Mandarinka [93]2 years ago
4 0

Using the principle of binomial probability, the probability that more than 3 friends win a prize is

Recall :

  • P(x = x) = nCx * p^x * q^(n-x)

<u>Given</u><u> </u><u>the</u><u> </u><u>Parameters</u><u> </u><u>:</u>

  • <em>Probability</em><em> </em><em>of</em><em> </em><em>success</em><em>,</em><em> </em><em>p</em><em> </em><em>=</em><em> </em><em>1</em><em>/</em><em>6</em><em> </em>
  • <em>q</em><em> </em><em>=</em><em> </em><em>1</em><em> </em><em>-</em><em> </em><em>p</em><em> </em><em>=</em><em> </em><em>5</em><em>/</em><em>6</em><em> </em>
  • <em>Number</em><em> </em><em>of</em><em> </em><em>trials</em><em>,</em><em> </em><em>n</em><em> </em><em>=</em><em> </em><em>7</em>
  • <em>x</em><em>≥</em><em>3</em><em> </em>

Hence,

P(x ≥ 3) = p(x = 3) + p(x = 4) + p(x = 5) + p(x = 6) + p(x = 7)

P(x ≥ 3) = 0.0781 + 0.0156 + 0.0019 + 0.0001 + 0.000003

P(x ≥ 3) = 0.095703

Therefore, the probability that more than 3 friends win a prize is 0.0957

Learn more : brainly.com/question/12474772

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Answer: 1/15

Explanation:

Since it's a class of 6, and there are 2 students who forgot their lunch. The probability of firs choosing a student who forget their lunch will be 2 out of 6 which is 2/6.

When the next student who forget their lunch is picked there'll be 5 students left which means the probability then will be 1 out of 5 which is 1/5.

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