A committee of four members is to be formed from the following individuals: P, Q, R, S, and T. The selection criteria are: 1) P and Q cannot be selected together. 2) R must be included if S is selected. 3) T can be included regardless of the others. Which of the following combinations meets the criteria?
If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 ÷ 2 × 4 + 6 - 3?
From the set of items: X, Y, Z, A, and B, the following conditions are given: 1) X cannot be selected if Y is selected. 2) Z must be included if A is selected. 3) B can be included regardless of the others. Which selection is valid?