Complementary Events and Probability

Two students $A$ and $B$ appeared in an examination. The probability that $A$ will qualify the examination is $0.05$ and that $B$ will qualify the examination is $0.10$. The probability that both will qualify the examination is $0.02$. Find the probability that at least one of $A$ and $B$ will not qualify (correct to $2$ decimal places).

If$\mathrm{P}\left(\mathrm{E}\right)=0.05$, what is the probability of 'not $\mathrm{E}$' is $0.95$.

If the probability of success of an experiment is $0.4,$ what is the probability of failure?

If the probability of a success is $p$, then probability of a failure is _____.

If the probability of an event $P\left(E\right)$ is$0.99$ , then probability of the event $P$$(not E)$ is _____.
 

In a cricket match, a batsman hits the boundary $8$ times out of $40$ balls he plays. If the probability (in simplest form) that he did not hit the boundary is $\frac{p}{q}$ then, write the value of $p-q$ as final answer.

The value of  $\mathrm{P} ( \mathrm{E} ) + \mathrm{P} ( \overline{\mathrm{E}} )$is _______________