There are some baskets. The chances of picking a loaded basket and choosing a red coloured one is 0.2 . For every 100 tries to pick one basket, 60 times a basket is either loaded or red in colour. What is the probability of choosing an empty basket plus choosing not a red coloured one.

The probability of inviting three friends on 5 consecutive days, exactly one friend a day and no friend is invited on more than two days is

A and B are two independent events. The probability of their simultaneous occurrence is $$\frac{1}{8}$$ and the probability that neither of them occurs is $$\frac{3}{8}$$. Then their individual probabilities are

A determinant of the second order is made with elements 0 and 1 . What is the probability that the determinant made is non-negative?