A group of children and adults were polled about whether they watch a particular TV show. The survey results, showing the joint relative frequencies and marginal relative frequencies, are shown in the two-way table.
& Yes & No & Total
\ \hline Children & 0.3 & 0.4 & 0.7
\ Adults & 0.25& x & 0.3
\ \hline Total & 0.55 & 0.45 & 1
What is the value of x?