If `A={a, b, c, d}, B={p, q, r} then find number of bijections

If A = {a, b, c} and B = {p, q, r}, then find the number of elements in A xx B .

If A={a,b,c,d},B={p,q,r,s} than which of the following are relations from A rarr B? Give reasons for your answer.: R_(3)={(a,p),(a,q),(d,p),(c,r),(b,r)}

If A={a,b,c,d},B={p,q,r,s} than which of the following are relations from A rarr B? Give reasons for your answer.R_(4)={(a,p),(q,a),(b,s),(s,b)}

If A = {p,q,r, s} and B = {1, 2, 3} , find which of the following is not a function from A to B? A. R_1={(p,1),(q,2),(r,1),(s,2)} B. R_2={(p,1),(q,1),(r,1),(s,1)} C. R_3={(p,1),(q,2),(p,2),(s,3)} D. R_4={(p,2),(q,3),(r,2),(s,2)} ANSWER: C

If Ldot CM of two positive numbers aandb is p^(3)q^(2)r where p,q,r are distinct prime number then find the number of ordered pair of (a,b) a.24 b.72 c.90 d.105

Let the set A={a,b,c,d,e} and P and Q are two subsets of A.The number ofways inwhich P and Q can be selected so that P nn Q has at least one common element.is a^(b)-c^(b) where a,b,c are coprime then find (a+c-b)