The new partner’s share in the total profit is \(\frac{3}{10}\). What share of the profit will remain for the old partners?

Correct answer: \(\frac{7}{10}\)

Taking the total profit as 1, the combined share of the old partners is \(1-\frac{3}{10}=\frac{7}{10}\). Therefore, \(\frac{7}{10}\) is correct. \(\frac{3}{10}\) is the new partner’s share, not the old partners’ remaining share. Exam tip: Subtract the new partner’s share from 1 to find the share left for the old partners.