Three flags each of different colours are available for a military exercise, Using these flags different codes can be generated by waving I. Single flag of different colours II. Any two flags in a different sequence of colours. III. three flags in a different sequence of colours. The maximum number of codes that can be generated is.

November 1, 2020 – by admin

Three flags each of different colours are available for a military exercise, Using these flags different codes can be generated by waving I. Single flag of different colours II. Any two flags in a different sequence of colours. III. three…

A question paper consists of five problems, each problem having three internal choices. In how many ways can a candidate attempt one or more problems?

July 24, 2019 – by admin

A question paper consists of five problems, each problem having three internal choices. In how many ways can a candidate attempt one or more problems? A. 63 B. 511C. 1023 D. 15 Explanation: Given that, the question paper consists of…

In a class there are 20 boys and 25 girls. In how many ways can a boy and a girl be selected?

July 24, 2019 – by admin

In a class there are 20 boys and 25 girls. In how many ways can a boy and a girl be selected? A. 400B. 500 C. 600 D. 20 Explanation: We can select one boy from 20 boys in 20…

In how many ways can three consonants and two vowels be selected from the letters of the word “TRIANGLE”?

July 24, 2019 – by admin

In how many ways can three consonants and two vowels be selected from the letters of the word “TRIANGLE”? A. 25 B. 13 C. 40D. 30 Explanation: The word contains five consonants. Three vowels, three consonants can be selected from…

A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the bag?

July 24, 2019 – by admin

A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the bag? A. ⁹C₂ B. ³C₂C. ¹⁶C₂ D. ¹²C₂ Explanation: Total number of balls = 9 +…

How many four digit even numbers can be formed using the digits {2, 3, 5, 1, 7, 9}

July 24, 2019 – by admin

How many four digit even numbers can be formed using the digits {2, 3, 5, 1, 7, 9} A. 60 B. 360 C. 120 D. 240 Explanation: The given digits are 1, 2, 3, 5, 7, 9 A number is…

How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)?

July 24, 2019 – by admin

How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)? A. 360 B. 60 C. 300 D. 180 Explanation: The given digits are six. The number of four digit…

The number of ways in which six boys and six girls can be seated in a row for a photograph so that no two girls sit together is_________?

July 24, 2019 – by admin

The number of ways in which six boys and six girls can be seated in a row for a photograph so that no two girls sit together is_________? A. (6!)2 B. 6! * ⁷P₆ C. 2(6!) D. 6! * 7…

A letter lock consists of three rings each marked with six different letters. The number of distinct unsuccessful attempts to open the lock is at the most__________?

July 24, 2019 – by admin

A letter lock consists of three rings each marked with six different letters. The number of distinct unsuccessful attempts to open the lock is at the most__________? A. 216 B. 243C. 215 D. 729 Explanation: Since each ring consists of…

A committee has 5 men and 6 women. What are the number of ways of selecting a group of eight persons?

July 24, 2019 – by admin

A committee has 5 men and 6 women. What are the number of ways of selecting a group of eight persons? A. 165 B. 185 C. 205 D. 225 Explanation: Total number of persons in the committee = 5 +…