The "CORRECT" answer is 80x^2
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Answer:
The probability that she wins exactly once before she loses her initial capital is 0.243.
Step-by-step explanation:
The gambler commences with $30, i.e. she played 3 games.
Let <em>X</em> = number of games won by the gambler.
The probability of winning a game is, <em>p</em> = 0.10.
The random variable <em>X</em> follows a Binomial distribution, with probability mass function:

Compute the probability of exactly one winning as follows:

Thus, the probability that she wins exactly once before she loses her initial capital is 0.243.
Answer:
The balance amount owed on the credit card altogether = $258.43
Step-by-step explanation:
Here, the current amount owed on the credit card = $225.45
Now, the amount of payment made to the credit card = $55.00
So, the remaining amount owed = Current Debt - Paid Amount
= $225.45 - 55 = $170. 45
Again, the purchase amount at Macy's = $87.98
⇒ New amount owed on credit card = Previous Debt + New Purchase
= $170. 45 + $87.98 = $258.43
Hence, the balance amount owed on the credit card = $258.43
Answer:
It is (A) y = 67.2
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