In a high school, the probability that a student owns a bicycle is 0-45 .A random sample of 10 students is chosen.(iv)(a)Find the probability that exactly 7 students own a bicycle.(b)Find the expected number of students who own bicycles.(v)A box contains 5 red and 3 yellow pebbles.(a)Find the odds in favour of drawing a red pebble from the box.(b)Two pebbles are drawn at random without replacement. Find theprobability that:(a)both pebbles are of the same colour.(B)at least one pebble is red.(Y)the second pebble is red given that the first pebble is yellow.

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Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.8: Probabilities Of Disjoint And Overlapping Events

Problem 2C

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In a high school, the probability that a student owns a bicycle is 0-45 A random sample of 10 students is chosen. (iv) (a) Find the probability that exactly 7 students own a bicycle. (b) Find the expected number of students who own bicycles.