Hexaware Company Programming Database

if a tap could fill entire tank in 18 hrs due to leakage, then in how much time tank can be emptied by leakage if tap can fill entire tank in 12 hrs without leakage?

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Hexaware Other Question

11. In the series 0, 3, 8, 15,__ What is the next number? the probability of a student possessing a ball point pen in exam is 3/5 & possessing an ink pen is 2/3. find his probability of possessing at least one of them