Permutations and Combinations

JEE Main Mathematics · 11 questions

All questions, latest first

• A person has three different bags and four different books. The number of ways, in which he can put these books in the bags so…20268 April, Shift 2 · Q9
• A building has ground floor and 10 more floors. Nine persons enter in a lift at the ground floor. The lift goes up to the 10^th…20266 April, Shift 2 · Q7
• The number of 4 -letter words, with or without meaning, each consisting of two vowels and two consonants that can be formed from…20266 April, Shift 1 · Q7
• A box contains 5 blue, 6 yellow and 4 red balls. The number of ways, of drawing 8 balls containing at least two balls of each…20265 April, Shift 2 · Q9
• Let A={1,2,3,4,5,6}. The number of one-one functions f: A → A such that f(1) ≥ 3, f(3) ≤ 4 and f(2)+f(3)=5, is ____.20265 April, Shift 1 · Q21
• Two players A and B play a series of games of badminton. The player, who wins 5 games first, wins the series. Assuming that no…20265 April, Shift 1 · Q22
• Let A={(a, b, c): a, b, c are non-negative integers and a+b+2 c=22}. Then n( A) is equal to:20264 April, Shift 2 · Q17
• The number of functions f:{1,2,3,4} →{a, b, c}, which are not onto, is:20264 April, Shift 1 · Q4
• The number of ways, of forming a queue of 4 boys and 3 girls such that all the girls are not together, is:20264 April, Shift 1 · Q8
• Let p_n denote the total number of triangles formed by joining the vertices of an n-side regular polygon. If p_n+1-p_n=66, then…20262 April, Shift 2 · Q7
• The number of seven-digit numbers, that can be formed by using the digits 1,2,3,5 and 7 such that each digit is used at least…20262 April, Shift 1 · Q6