5. A building contractor tendered for two independent contracts, X and Y.
The probabilities that he will win contract X is 0.5 and not win contract
Y is 0.3. What is the probability that he will win:
(A)both contracts;
(B)exactly one of the contracts;
(c) neither of the contracts?

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is

The sum of five and a number n is at least 12

If f(x)=3 over x+2 - square root x-3 then f(7)=