Answer: You have a better chance if you do not replace the red marble.
Step-by-step explanation:
The bag has:
5 red marbles
8 blue marbles
4 yellow marbles
3 green marbles
A total of 5 + 8 + 4 + 3 = 20
You want to draw a red marble and then a blue marble.
The probability of drawing a red marble in your first attempt is the number of red marbles divided the total number of marbles:
P1 = 5/20
now you want to draw a blue marble.
If you replace the red marble, you have 20 marbles again in the bag, then the probability of drawing a blue marble is:
P2 = 8/20
The joint probability is P = P1*P2 = (5/20)*(8/20) = 0.1
If you do not replace the red marble, you have 19 total marbles in the bag, then the probability of taking a blue marble is:
P2 = 8/19
The joint probability is:
P = P1*P2 = (5/20)*(8/19) = 0.105
The probability is slightly bigger if you do not replace the red marble.
Well, to see if she can afford the skateboard, start by finding the discount and then finding the sales tax of that.
To find the discount, first find 15% of $139.99 and then subtract it since that's how much you're getting off.
<em>Remember: </em><em>to find percentage, convert the percentage into a decimal by dividing it by 100, and then multiplying it by what you're finding a percentage of. </em>
15% ÷ 100 = 0.15
$139.99 x 0.15 = 20.9985, which can be rounded up to $21.
$139.99 - 21 = 118.99.
Now that we have the discount, we find the sales tax, which can be found the same way as the discount, but we add it to the total instead fo subtracting it.
7% ÷ 100 = 0.07
0.07 x 118.99 8.3293 or $8.33
118.99 + 8.33 = 127.32
<em>This is the final total of how much the skateboard would cost.</em>
So:
No, she would not have enough money to buy the skateboard. With the discount alone, she could afford it, since $118 falls in her budget range, but with the added tax, it's 13 dollars over and she cannot afford the skateboard.
The answer is C) 0.04 becuase the 4 is in the hundredths place
What? Can you attach a photo?
It looks like it’s already answered I’m confused about that
