Final answer:
To evaluate Q, subtract P from 1 using the given value of P.
Step-by-step explanation:
To evaluate Q, we need to subtract P from 1.
Given that P = 0.781015, we can calculate Q using the formula:
Q = 1 - P
Q = 1 - 0.781015
Q ≈ 0.218985
Therefore, Q is approximately 0.218985.