we know that
P(both parts defective) = P(1st is defective) * P(2nd is defective)
Probability of 1st detective:
total parts =50
number of defects =6
so,
P(1st is defective)
Probability of 2nd detective:
total parts =49
number of defects =5
so,
P(2nd is defective)
Probability of both detective:
P(both parts defective) is
...............Answer
Answer:
y ≥ 6.25
Step-by-step explanation:
f(x)=4x²+2x-6
positive (4) leading coefficient, curve is left up and right up
x coordinate of vertex: x = - b/2a = - 2/2*4 = - 1/4 (-0.25)
y = 4*(-1/4)² + 2*(-1/4) - 6 = -6 1/4 (-6.25) ... extreme
range: y ≥ - 6.25 [-6.25,∞)
[ Answer ]
[ Explanation ]
-----------------------------------
-0.8b + 4.1c + 3.2b - 0.1c
-0.8b + 3.2b + 4.1c - 0.1c
2.4b + 4.1c - 0.1c
2.4b + 4c