Which strategy would you use to find 2+8? doubles plus 1, count on, doubles, or doubles minus 1

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Jada has a monthly budget for her cell phone bill. last month she spent 120% of her budget, and the bill was 60$. what is jada’s monthly budget