Question
Which of the following cannot be valid assignment of probability for elements or outcomes of sample space s = W1, W2,W3, W4, W5, W6, W7.
| Elementary events: | W1 | W2 | W3 | W4 | W5 | W6 | W7 |
| $\frac{1}{7}$ | $\frac{1}{7}$ | $\frac{1}{7}$ | $\frac{1}{7}$ | $\frac{1}{7}$ | $\frac{1}{7}$ | $\frac{1}{7}$ |