A teacher selects a student at random from his class of 20 students every week for 20 consecutive weeks. There are 8 girls and 12 boys in the class. What is the probability that there are exactly 10 weeks in which a girl is selected? 1) 20 (.2) 8 (.8) 12 O 2) 2) 20 3) 3) 10) (2)¹2 (8)8 20 8 (₁4) ¹0 (6) 10 20 4) (4)¹0 (6) ¹0 10
A teacher selects a student at random from his class of 20 students every week for 20 consecutive weeks. There are 8 girls and 12 boys in the class. What is the probability that there are exactly 10 weeks in which a girl is selected? 1) 20 (.2) 8 (.8) 12 O 2) 2) 20 3) 3) 10) (2)¹2 (8)8 20 8 (₁4) ¹0 (6) 10 20 4) (4)¹0 (6) ¹0 10
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![A teacher selects a student at random from his class of 20 students every week for
20 consecutive weeks. There are 8 girls and 12 boys in the class. What is the
probability that there are exactly 10 weeks in which a girl is selected?
1)
2)
20
70 (2)8 (8) 12
20
40 (-2) ¹² (8)8
20
3) (-4) ¹0 (6) 10
20
4) (10) (-4) ¹0 (6) ¹0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fada2d32d-a176-418f-aab9-c8e9e8a4e1ba%2F93acad37-58af-4d8f-a1b4-da42b6c2f66c%2Fi8608i_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A teacher selects a student at random from his class of 20 students every week for
20 consecutive weeks. There are 8 girls and 12 boys in the class. What is the
probability that there are exactly 10 weeks in which a girl is selected?
1)
2)
20
70 (2)8 (8) 12
20
40 (-2) ¹² (8)8
20
3) (-4) ¹0 (6) 10
20
4) (10) (-4) ¹0 (6) ¹0
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