Solution Let E1 be the event that coin 1 is selected and E2 the event that coin 2 is selected. Let F be the event that exactly 7 of the 10 flips lands on heads, let G be the event that the fist flip is heads.
If you are doing a literal equation all you have to do is isolate the h. First get rid of the fraction by multiplying both sides by 2. 2a=bh Then divide both sides by b. 2a/b=h Hope this helps!
