Using all the letters of the word “NOKIA”, how many words can be formed, whi
Using all the letters of the word “NOKIA”, how many words can be formed, which begin with N and end with A?
2 men and 1 woman board a bus of which 5 seats are vacant, one of these 5 seats
2 men and 1 woman board a bus of which 5 seats are vacant, one of these 5 seats is reserved for ladies. A…
Using all the letters of the word “THURSDAY”, how many different words can b
Using all the letters of the word “THURSDAY”, how many different words can be formed?
Three dice (each having six faces with each face having one number from 1 or 6)
Three dice (each having six faces with each face having one number from 1 or 6) are ralled. What is the number of possible…
Three flags each of different colours are available for a military exercise, Usi
Three flags each of different colours are available for a military exercise, Using these flags different codes can be generated by wavingI. Single flag…
A question paper consists of five problems, each problem having three internal c
A question paper consists of five problems, each problem having three internal choices. In how many ways can a candidate attempt one or more…
In a class there are 20 boys and 25 girls. In how many ways can a boy and a girl
In a class there are 20 boys and 25 girls. In how many ways can a boy and a girl be selected?
In how many ways can three consonants and two vowels be selected from the letter
In how many ways can three consonants and two vowels be selected from the letters of the word “TRIANGLE”?
A bag contains nine yellow balls, three white balls and four red balls. In how m
A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the…
How many four digit even numbers can be formed using the digits {2, 3, 5, 1, 7,
How many four digit even numbers can be formed using the digits {2, 3, 5, 1, 7, 9}
How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(rep
How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)?
A letter lock consists of three rings each marked with six different letters. Th
A letter lock consists of three rings each marked with six different letters. The number of distinct unsuccessful attempts to open the lock is…