Answer:
Probability that A wins is 2/3.
Step-by-step explanation:
player A can win in 2 ways
1) Player A wins immediately by getting head
2) Player A loses immediately by getting tail but wins ultimately as player B gets losses.
a) Probability of 1 to happen is 1/2.
b) Similarly for the event 2 to happen the condition is that A get's a tail and B losses.
Let probability that A wins is 'p' thus we have

Solving for 'p' we get
p= 2/3.
Answer:
B. He would still need 51.50
Step-by-step explanation:
First I added up all the deposits Emilio made
so: 621.96+83.11+52.89+307.84=1065.8
then i subtract 129 from the total (1065.8)
which equals 936.8 and I add the 11.5 interest.
which equals 948.3 which is 51.70 less than 1000. Therefore, Emilio still need 51.70 in order to meet his saving accounts goal.
30% of 42 is 12.6$.
42-12.6 = 29.4$ is the price of the pair with discount applied.
Tax 7%
29.4 * 7% = 2.06
29.4$ + 2.06$ = 31.46 $ final price with discount and tax applied.
the answer of 0.4 is 2/5 or 2 1/5