Question
A letter is taken out at random from ‘ROORKEE’ and
another is taken out from ‘BOOKKEEPER’. The probability that they are the same letter isSolution
Hence, B and P are not common and same letters can be R, O, K, E Probability of choosing R = (²C₁)/(⁷C₁) × (¹C₁)/(¹⁰C₁) = 1/35 Probability of choosing O = (²C₁)/(⁷C₁) × (²C₁)/(¹⁰C₁) = 2/35 Probability of choosing K = 1/(⁷C₁) × (²C₁)/(¹⁰C₁) = 1/35 Probability of choosing E = (²C₁)/(⁷C₁) × (³C₁)/(¹⁰C₁) = 3/35 Hence, Required Probability = 1/35+ 2/35+ 1/35+ 3/35 = 7/35 = 1/5
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Which of the following is true about Information?
Which tier uses application server
In a relational database, a foreign key is used to:
A collection of Data organized in a manner that allows access, retrieval & use of the data
Which normal form deals with the issue of transitive dependencies?
How many types of architecture we have in DBMS
Which of the following joins returns all rows from both tables, filling in NULL values for non-matching rows?
Which of the following storage devices is considered non-volatile?
Which database model is based on the mathematical set theory and is the foundation of many modern databases?
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