Help ASAP please! .

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m