3b. [4 marks] The Head of Year, Mrs Smith, decides to select a student at random from the year group to read the notices in assembly. There are 80 students in total in the year group. Mrs Smith calculates the probability of picking a male student 8 times in the first 20 assemblies is 0.153357 correct to 6 decimal places. Find the number of male students in the year group.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section: Chapter Questions
Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...
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3b. [4 marks]
The Head of Year, Mrs Smith, decides to select a student at random from the year group to read the
notices in assembly. There are 80 students in total in the year group. Mrs Smith calculates the probability
of picking a male student 8 times in the first 20 assemblies is 0.153357 correct to 6 decimal places.
Find the number of male students in the year group.
Transcribed Image Text:3b. [4 marks] The Head of Year, Mrs Smith, decides to select a student at random from the year group to read the notices in assembly. There are 80 students in total in the year group. Mrs Smith calculates the probability of picking a male student 8 times in the first 20 assemblies is 0.153357 correct to 6 decimal places. Find the number of male students in the year group.
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