On average, 8% of the candidates sitting an examination are awarded a merit. Groups of 50 candidates

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On average, 8% of the candidates sitting an examination are awarded a merit. Groups of 50 candidates are selected at random.

a. How many candidates in each group are not expected to be awarded a merit?

b. Calculate the variance of the number of merits in the groups of 50.

c. Find the probability that:

i. Three, four or five candidates in a group of 50 are awarded merits

ii. Three, four or five candidates in both of two groups of 50 are awarded merits.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

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Question Posted: Sep 14, 2021 02:11 AM

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On average, 8% of the candidates sitting an examination are awarded a merit. Groups of 50 candidates

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a The number of candidates not expected to be awarded a merit in a group of 50 can be found by using ...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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