Question

The magazine mass marketing company has received 16 entries in its latest sweepstakes. They know that the probability of receiving a magazine subscription order with an entry form is 0.5. What is the probability that no more than 12 of the entry forms will include an order?

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Answer to a math question The magazine mass marketing company has received 16 entries in its latest sweepstakes. They know that the probability of receiving a magazine subscription order with an entry form is 0.5. What is the probability that no more than 12 of the entry forms will include an order?

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Hermann
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120 Answers
1. Identify the parameters of the binomial distribution:
n = 16, \, p = 0.5, \, \text{and we need } P(X \leq 12)

2. Write the cumulative probability formula for the binomial distribution:
P(X \leq 12) = \sum_{k=0}^{12} \binom{16}{k} (0.5)^k (0.5)^{16-k}

3. Simplify the general term:
(0.5)^k \cdot (0.5)^{16-k} = (0.5)^{16}

4. Calculate the cumulative sum:
P(X \leq 12) = \sum_{k=0}^{12} \binom{16}{k} (0.5)^{16}

Using technology or tables:
P(X \leq 12) \approx 0.9717

Answer: The probability that no more than 12 of the entry forms will include an order is approximately 0.9717.

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