pyq/2024/csat/80

In some code, letters P, Q, R, S, T represent numbers 4, 5, 10, 12, 15. It is not known which letter represents which number. If Q – S = 2S and T = R + S + 3, then what is the value of P + R – T?

(A) 1

(B) 2

(C) 3

(D) Cannot be determined due to insufficient data