We can write "n C r" as "C(n,r)" which is more function notation in style.
C(n,r) = C(n,n-r) due to symmetry on Pascal's Triangle
Based on that rule
C(50,45) = C(50,5)
note how n = 50, r = 45, n-r = 50-45 = 5
Answer: Choice B
U have to find the slope
Using the formula y2-y1/x2-x1
Answer20+20=40
Step-by-step explanation:
The answer is 24 this needs to be longer so it will send
Answer:
The probability of seeing both = 0.32
Step-by-step explanation:
<u>Step:-(i)</u>
Given data the probability that you see a butterfly during a nature center tour is 80%
Let 'B' be the event of butterfly during a nature center tour
The probability that you see a butterfly during a nature center tour is 80%
P(B) = 80% = 0.80
Given data the probability that you see a turtle is 40%
Let 'T' be the event of turtle a nature center tour
P(T) = 40% = 0.40
<u>Step:-(ii)</u>
<u>Independent events </u>
If the occurrence of the event B is not effected by the occurrence or non-occurrence of the event 'A' , then the event 'B' is said to be independent of 'A'
If A and B are independent events then
P(A ∩B) =P(A) P(B)
now the given data the butterfly and turtle are independent events
probability of seeing both
P(B∩T) = P(B).P(T)
= 0.80 × 0.40
= 0.32
