Savannah is painting a striped background for a mural on a wall that is 15 yards long. She wants a total of 96 stripes that are
2 answers:
Answer:
She should divide the length of the wall by the number of strips.
Step-by-step explanation:
We want each of our 96 stripes to be just wide enough so that all 96 of them cover the 15 yards long mural with no spaces left. To find the necessary width of the stripes, we just need to divide the length of the wall by the number of stripes:
This gives a width of 0.15625 yards for each stripe.
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Answer:
Step-by-step explanation:
We know that:
In a deck of 52 cards there are 4 aces.
Therefore the probability of obtaining an ace is:
P (x) = 4/52
The probability of not getting an ace is:
P ('x) = 1-4 / 52
P ('x) = 48/52
In this problem the number of aces obtained when extracting cards from the deck is a discrete random variable.
For a discrete random variable V, the expected value is defined as:
Where V is the value that the random variable can take and P (V) is the probability that it takes that value.
We have the following equation for the expected value:
In this problem the variable V can take the value V = 9 if an ace of the deck is obtained, with probability of 4/52, and can take the value V = -1 if an ace of the deck is not obtained, with a probability of 48 / 52
Therefore, expected value for V, the number of points obtained in the game is:
So: