CTET Class I to V 10 Jan 2023 Paper

540 students of a school voted for the best group song presented in a competition. Then, on the basis of the obtained votes, these group songs A, B, C and D were represented on a pie chart by angles of 120°, 80°, 70°, 90° respectively at the centre. How many students voted for group song B ? (Assume that one student has voted only for one group song.