we are given
• 6 science-fiction stories
• 4 adventure stories
• 3 historical stories
• 2 sports stories
so,
total number of stories =6+4+3+2
total number of stories =15
Probability of selecting science stories:
number of science stories =6
total number of stories =15
P(S)=(number of science stories)/(total number of stories)


Probability of selecting adventure stories:
number of adventure stories =4
total number of stories =15
P(A)=(number of adventure stories)/(total number of stories)


now, we can find
the probability that the story Artie selects is either a science-fiction story or an adventure story
that is P(AUS)
p(AUS)=p(A)+p(S)-p(A∩S)
we know that
p(A) and p(S) are independent
so,
p(A∩S)=p(A)*p(S)
we can plug it
p(AUS)=p(A)+p(S)-p(A)*p(S)
we get
p(AUS)=
p(AUS)=
...........Answer
Answer:
-2
Step-by-step explanation:



X+x+1+x+2=-39
3x+3=-39
3x=-42
x=-14
the three integers are -14,-13, and-12
Answer: $24.34
Step-by-step explanation:
28/X=115/100
Part/Whole= %/100
28=1.15*x
Answer:
-288
Step-by-step explanation:
<h3>Given AP</h3>
<u>To find,</u>
- The sum of first 18 terms
<h3>Solution</h3>
<u>The first and 18th terms as per the formula</u>
- t(1) = 3 - 2 = 1
- t(18) = 3 - 18*2 = 3 - 36 = -33
- S18 = 1/2*18(1 - 33) = 9*(-32) = -288
<u>Answer is</u> -288