यदि a+b = 1, b+c= 2 तथा c+a=3 हो, तो (a+b+c+ab+bc +ca) का मान क्या होगा?
(a) 3.5
(b) 7
(c) 18
(d) 9
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3.5 is the ans of this question
ramlakhankumarg6:
answer is, 5.
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