The number of five–digit telephone numbers having at least one of their digits repeated is
The number of five–digit telephone numbers which can be formed using the digits of 0, 1, 2,...., 9 is 105. The number of five-digit telephone numbers which have none of their digits repeated is 10P5 = 10 × 9 × 8 × 7 × 6 = 30240 Hence the required number =105 - 30240 = 69760
What is the code for the word “Yourself”?
What may be the code for “Announce Unite Hundred”?
In a certain code language, ‘FRESTO’ is written as BNAOPK. How will SPRING be written in hat language?
In a certain code language, "some bats are" is written as "dev naw nbd", " bats are balls" is written as "dev uaz nbd" and "balls bats over" is written ...
What does ‘yaf’ stand for?
If 'TOGETHER' is coded as 7 and 'BEAUTIFUL' as 8, then what is the code number for the word 'MONOPOLY'?
In a certain code language, ‘TEAR’ is written as ‘4’ and ‘FLIGHT’ is written as ‘6’. What will be the code for ‘HESITATION’ in that ...
If A = 1 and REST = 62, then ' EVEREST' =
If book is called notebook, notebook is called pencil, pencil is called dictionary and dictionary is called pen, what we use for reading?
In a certain code language, if NAUGHTY is coded as 3198764 and TAKE is coded as 6152, then YAK will be coded as?
