Answer:
-11
Step-by-step explanation:
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Answer: 0.3983
Step-by-step explanation:
This can be likened to having 5 samples And determining the probability of getting 1 of these 5 people getting an athlete foot.
This is Solved by using the probability distribution formula selection method for finding the probability of occurrence of a random variable. X.
When X=r, the Formula is denoted by:
P(X=r) = nCr × p^r × q^n-r
Where n=number of sample and in this case n=5
p= probability of success and in this case, p=0.16
q= probability of failure = 1-p = 1-0.16 = 0.84
r = favourable outcome from available sample = 1.
P(X=1) = 5C1 × 0.16^1 × 0.84^4
P(X=1) = 0.3983.
Answer:
Step-by-step explanation:
x²+10x+21=0
x²+10x+(10/2)²-(10/2)²+21=0
x²+10x+25-25+21=0
(x+5)²-4=0
(x+5)²=4
(x+y)²=(x+y)(x+y)=x(x+y)+y(x+y)=x²+xy+xy+y²=x²+2xy+y²
(x+y)²=x²+2xy+y²
coefficient of x=2y
y²=[(coefficient of x)/2]²=(2y/2)²=y²
