Answer:
Step-by-step explanation:
Let x represent the number of spelling questions in the test.
Let y represent the number of vocabulary questions in the test.
Mrs morals wrote a test with 15 questions covering spelling and vocabulary. This means that
x + y = 15
Spelling questions (x) are worth 5 points and vocabulary questions (y) are worth 10 points. The maximum number of points possible on the test is 100. This means that
5x + 10y = 100 - - - - - - - - - - - 1
Substituting x = 15 - y into equation 1, it becomes
5(15 - y) + 10y = 100
75 - 5y + 10y = 100
- 5y + 10y = 100 - 75
5y = 25
y = 25/5 = 5
x = 15 - y = 15 - 5 = 10
Answer:
x + 79 = 90
x = 11 degrees
Step-by-step explanation:
Answer: The first and second options are random samples.
First, assign numbers and drawing the number from a bowl would be a great way to get a random sample. Everyone has the same chance of being selected.
Second, using an alphabetical order is just like the first choice. The chances are the same for everyone.
However, in the third choice, you won't get a random sample. You will get an old and young group. Not a random group of the population.
Answer:
their are different sizes of soup bowls
<u>Answer:</u>
Difference between the experimental and the theoretical probability is 2/5 .
<u>Step-by-step explanation:</u>
Spinner is spun 10 times, and experimental probability of landing on a 3 is 1/2, i.e. out of 10 times spinner lands 5 times into 3.
Now, theoretical probability of landing on a 3 is 1/10.
∴ Difference between the experimental and the theoretical probability :
<em> ⇒ (1/2) - (1/10) </em>
<em> ⇒ </em><em>2/5</em>
