CAT Exam Category

p(A)=1/3;
p(B)=1/2
p(A ᴖB)=1/4;
p(A’ᴗB’)= ?
plz solve this with explanation,,

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CAT Other Question

What is the unit digit of (1^1+2^2+3^3+……+2008^2008)? what is the value of (-3/7)^-4
a, 81/2401
b, 2401/81
c, 18/2401
d, 81/2410