IBPS Government Jobs Exams Numerical Ability Probability

There are three sections A, B and C in a class. Every section has some boy and some girl students in it. Probability of a girl being selected when one student is selected randomly from section A is 2/5, that from section B is 4/9 and that from section C is 5/9. If the ratio of total number of students in sections A, B and C is 10 : 12 : 9, then what is the probability of a girl being selected when one student is selected randomly from the students from all the three sections together? (A) 14/31 (B) 11/23 (C) 13/31 (D) 43/93

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IBPS Other Question
Curved surface area of a cylinder is 1056 m². Radius of cylinder is 14 m. What will be volume of a cone whose radius is half of radius of cylinder and height is 33⅓% more than that of cylinder? (A) 821⅓ m³ (B) 621 ⅓ m³ (C) 821⅔ m³ (D) 921⅓ m³ Among four consecutive odd numbers the sum of the squares of the first two numbers is 64 less than the sum of the squares of the next two numbers. Find the greatest of these four numbers. (A) 9 (B) 15 (C) 11 (D) 7 (E) 13