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olga2289 [7]
3 years ago
11

The pie chart to the right shows how adults rate their financial shape. Suppose 4 people are chosen at random from a group of 14

00. What is the probability that all four would rate their financial shape as​ excellent? (Make the assumption that the 1400 people are represented by the pie​ chart.)
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
6 0

<u>Question Completion</u>

PIE CHART NUMBERS:

  • Excellent 9%
  • Good 41%
  • Fair 36%
  • Poor 13%
  • Other 1%

Answer:

0.000063

Step-by-step explanation:

Number of Respondents, n=1400

Probability that they would rate their financial shape as​ excellent = 0.09

Number of Those who would rate their financial shape as excellent

=0.09 X 1400

=126

Therefore:

The probability that 4 people chosen at random would rate their financial shape as​ excellent

=\dfrac{^{126}C_4 \times ^{1400-126}C_0}{^{1400}C_4} \\=\dfrac{^{126}C_4 \times ^{1274}C_0}{^{1400}C_4}\\=0.000063 $(correct to 6 decimal places)

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