MathematicsHard178×since 2002Q5186Let 3,a,b,c3, a, b, c3,a,b,c be in A.P. and 3,a−1,b+1,c+93, a-1, b+1, c+93,a−1,b+1,c+9 be in G.P. Then, the arithmetic mean of a,ba, ba,b and ccc is :A-4B-1C13D11Check answerSkip