If `M sube N` , then find `M nn N `

If P sube M , then find P nn (P uu M)

If n(A)=4, n(B)=6 and n(A uu B)=8 , then find n(A nn B) .

If n(A) = 3, n(B) = 5 and n(A uu B) = 7 , then find n(A nn B) .

If two positive integers m and n are expressible as as m = ab^(2) and n = a^(3) b , where a and b are prime numbers, then find LCM (m, n)

If n ( A nn B') = 2x + 40, n(A nn B) = x+10 and n(B nn A') = 60-3x , then find n(A uu B) .

If n (A)=10, n(B)=21 and n(A nn B)=5 , then find n(A uu B) .

For any two numbers (m+n) : (m-n) : mn = 7 : 1: 60, then find the value of 1/m:1/n

Prove that (i) A nn B sube A( ii) A nn B sube B( iii) If C sube A and C subebar(B), then C sube A nn B( iv )A=B rArr A nn C=B nn C for any set C, (v) If B sube A, then A nn B=B and conversely.

If the average of m numbers is n^(2) and that of n numbers is m^(2) . Then find the average of ( m + n) numbers.

If the m^(th) term of a G.P is n and n^(th) term be m then find the (m+n)^(th) term