The some of daily income of P, Q and R is TK.90. If Q earns TK.10 more than P and R earns double of what Q earns, then what is the average of daily income of P and Q?

The some of daily income of P, Q and R is TK.90. If Q earns TK.10 more than P and R earns double of what Q earns, then what is the average of daily income of P and Q? Correct Answer 20

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Among M, N, D, P and K, who earns more than only the least earner among them ? Statements : I. N earns more than M and P but less than only D. II. M earns more than P who earns less than K.