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
Eight people are sitting in two parallel rows containing 4 people each in such a way that there is equal distance between adjacent persons. In row 1, D,...
Three different positions of the same dice are shown. Find the number on the face opposite the face showing ‘6’.
Statements:
Some apples are oranges.
All oranges are fruits.
Conclusions:
I) All apples are fruits.
II) Some frui...
Which two numbers should be interchanged to make the following equation correct?
96 ÷ 8 − 3 × 6 + 32 = 24
Select the option figure that will replace the question mark (?) in the figure given below to complete the pattern.
‘F + R’ means ‘F is the mother of R’
‘F – R’ means ‘F is the father of R’
‘F ÷ R’ means ‘F is the husband of R’...
In a certain code language, ‘MUST’ is coded as ‘7913’ and ‘TALE’ is coded as ‘8672’.
What is the code for ‘T’ in the given co...
In a certain code language, 'LAST' is coded as 'PFWY'. What is the code for 'MEAN' in that code language?
Question Figure:
A, B, C, D, E, F, G and H are sitting around a square table, four of them sit at the 4 corners, while four sit at the middle of the sides. The ones who ...
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