Maths Permutation and Combination Tutorial 1

Test Your Skills

A) In how many ways can 6 girls and 2 boys be arranged in a row

(a) without restriction?

(b) such that the 2 boys are together?

(c) such that the 2 boys are not together?

B) How many numbers greater than 1000 can be formed with the digits 3,4,6,8,9 if a digit cannot occur more than once in a number?

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Answers
A) (mn+1)/2 (B) 75

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