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how do i solve parajumbles very easily for sbi po 2016

when u will upload mains mocks for sbi clerk?

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A 100 litre vessel contains water and milk in the ratio 2 : 3 and a 50 litre vessel contains water and milk in the ratio 3 : 2. If the contents of these vessels are mixed in the ratio 1 : 3 in a third vessel, what will be the respective ratio of milk to water in the third vessel? a) 12 : 13 b) 9 : 11 c) 11 : 9 d) 13 : 12

There are 7 boys and 8 girls in a class. A teacher has 3 items viz a pen, a pencil and an eraser, each 5 in number. He distributes the items, one to each student. What is the probability that a boy selected at random has either a pencil or an eraser?

2^90/91 remainder?

Increase in denominator,decreases the fraction value by how much percent?

There are 4 qualifying examinations to enter into Oxford University: RAT, BAT, SAT, and PAT. An Engineer cannot go to Oxford University through BAT or SAT, A CA on the other hand can go to the Oxford University through the RAT, BAT & PAT but not through SAT. Further there are 3 ways to become a CA (viz, Foundation, Inter & Final). Find the ratio of number of ways in which an Engineer can make it Oxford University to the number of ways a CA can make it to Oxford University.