Answer:
10.55% probability
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
The order in which the CDs are chosen is not important. So we use the combinations formula to solve this question.
1 Bach CD, from a set of 4.
1 Beethoven CD, from a set of 6.
1 Brahms CD, from a set of 3.
1 Handel CD, from a set of 2.
So, D=144
4 CDs from a set of 4+6+3+2 = 15.
So, T= 1365
p= D/T= 144/1365 = 0.1055
10.55% probability that she will choose one by each composer
Answer:
24
Step-by-step explanation:
All of the students in the last three grade groups scored 70% or better:
11 + 8 + 5 = 24
24 students scored 70% or better.
Answer:
The correct answer is 16.7
Step-by-step explanation:
To find the answer, use the Pythagorean Theorem, which states that the square of the two legs equals the square of the hypotenuse.
a^2 + b^2 = c^2
x^2 + 8^2 = 18.5^2
x^2 + 64 = 342.25
x^2 = 278.25
x = 16.7
-5/2x + b = y
Check photo for explanation :)
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