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Unformatted text preview: randomly and the colours are recorded. (a) Find the probability that Mary selects exactly one red rose. (b) Given that Mary has selected exactly one red rose, find the probability that only one of the other two roses is yellow. 4. A teacher randomly selected 8 students from a class of 12 boys and 18 girls to form a group to take part in a flag-selling activity. (a) Find the probability that the group consists of at least 1 boy and 1 girl. (b) Given that the group consists of at least 1 boy and 1 girl, find the probability that there are more than 3 boys in the group....
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