In a second year class of a certain college, 2/3 are boys and the rest are girls. 4/5 of the boys and 9/10 of the...

In a second year class of a certain college, 2/3 are boys and the rest are girls. 4/5 of the boys and 9/10 of the girls are right handed ,the rest are left handed. The probability that a right handed students will answer a question correctly is 1/10 and the corresponding probability for a left handed students is 3/10 irrespective of the sex.
(a) Draw a tree diagram to represent the above information
(b) Determine:
i) The probability that a student chosen at random from the class is left hand
ii) The student is a girl and answers the questions incorrectly
iii) The probability that a question is answered correctly

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Kavungya answered the question on November 20, 2019 at 11:28

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