Find a recursive set definition for the set contaning all bit strings that contain an even number of 0s

With alll of except for the 2 that i did already

Problem situation: caren is making rice and beans. she can spend no more than $10 on ingredients. she buys one bag of rice for $4.99. beans cost $0.74 per pound. how many pounds of beans, x, can she buy? inequality that represents this situation: 10≥4.99+0.74x drag each number to show if it is a solution to both the inequality and the problem situation, to the inequality only, or if it is not a solution.

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if