We have been given a Quadratic equation, where we have to find the real values of x ~
So, let's proceed with middle term splitting method :
Now, we have two conditions here~
Either (x + 6) = 0
or (x - 1) = 0
Answer:
a) How many African-Americans would you expect to get promotions?
Since we have been asked to follow the binomial distribution, (B (40,0.2)
To calculate the mean of the BPD = n*p
where n is the number of promotions and p = probability
= 40 x 0.2 = 8
You expect 8 promotions.
b)
The probability that 5 African-Americans = P (X = 5)
P( X = 5 ) = 40 sqr root ( 5 * 0.2^5 * 0.8^35 ) = 0.0854
c) What is the probability that five or fewer African-Americans receive promotions?
P( X <= 5) = P(X=5) + P(X=4) + ... + P(X=1) + P(X=0)
faster way is calculator
binomcdf(40, .2, 5) = 0.1613
Step-by-step explanation:
Answer:
A = 189 yd²
Step-by-step explanation:
The area (A) of a triangle is calculated as
A = 
bh ( b is the base and h the perpendicular height )
Here b = DE = 21 , h = the line from F to DE = 18 , then
A = × 21 × 18 = 10.5 × 18 = 189 yd²
0.60 x = 22 (as 60% = 0.60)
x = 22 / 0.60
0.45x = (22 * 0.45) / 0.60 = 16.5
