If P = +, Q = -, R = ×, S = ÷, then insert the proper notations between the successive numbers in the equation 60 _ 15 _ 3 _ 20 _ 4 = 20:

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (B) QRPS

ব্যাখ্যা

60 - 15 × 3 + 20 ÷ 4 = 60 - 45 + 5 = 20, i.e. Q R P S. (Answer as per the official UPSC answer key.)