Question
A class has 28 students, including 8 girls and the
…… boys. If …… girls leave the class, the probability of randomly selecting a boy becomes 5/6. Which of the following satisfies the two blanks given in the question? I) 20, 4 II) 20, 3 III) 20, 2Solution
Let the number of girls left be x, Total students = 28 The number of girls = 8 Then, the number of boys = 20 -Constable/1731042428-201.JPG)
20 /(28 – x) = 5/6 28 – x = 24 x = 4
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